Step-by-step derivation
S001 · implies
Before
original coefficients=[-6, -1, 3, 3, -1, -1];basis=[1,x,y,x^2,xy,y^2]
After
u(x,y)=(-6)+(-1)*x+(3)*y+(3)*x^2+(-1)*x*y+(-1)*y^2
Conditions: none
Read the six coefficients in their fixed monomial order,not the descending[a,b,c] order of a univariate quadratic.
Step identifiers and dependencies
Rule: bivariate_scalar_polynomial_basis_roles · Uses: G001
S002 · calculation
Before
u_xx constant := mul(2, 3)
After
u_xx constant = 6
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S001
S003 · calculation
Before
u_yy constant := mul(2, -1)
After
u_yy constant = -2
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S002
S004 · implies
Before
u coefficients=[-6, -1, 3, 3, -1, -1];u_x=c1+2*c3*x+c4*y;u_y=c2+c4*x+2*c5*y
After
u_xx=6;u_xy=-1;u_yy=-2
Conditions: none
Differentiate each monomial by fixed-coordinate slice rules.The linear x term differentiates to a constant,and xy contributes c4 to u_xy.These are polynomial identities,not an assumed general mixed-partial exchange theorem.
Step identifiers and dependencies
Rule: polynomial_second_partials_explicit_monomials · Uses: G001, S003
S005 · calculation
Before
interior Laplacian := sum(6, -2)
After
interior Laplacian = 4
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S004
S006 · calculation
Before
interior constant signed residual := sub(4, 5)
After
interior constant signed residual = -1
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S005
S007 · implies
Before
u coefficients=[-6, -1, 3, 3, -1, -1];constant Laplacian=4;source=5
After
constant residual=-1;interior polynomial identity=No
Conditions: none
For this candidate u_xx+u_yy is constant.A zero constant residual is the declared symbolic identity.No boundary data have been checked here,nor is this a general Poisson existence/uniqueness proof.
Step identifiers and dependencies
Rule: interior_identity_separate_boundary_obligation · Uses: G001, S006
S008 · implies
Before
ordered bounds=[-8, 8, -7, 9];supplied edge order=[left, right, bottom, top]
After
all four distinct edges present;preserve original record order
Conditions: none
Each of the four edges appears once;duplicates do not substitute for missing edges.Preserve supplied record order and pairing.Degenerate rectangles still use the declared polynomial-certificate protocol;do not invent a nonempty open interior.
Step identifiers and dependencies
Rule: four_boundary_records_complete_not_sorted_away · Uses: G001, S007
S009 · calculation
Before
boundary record0 fixed coordinate squared := mul(-8, -8)
After
boundary record0 fixed coordinate squared = 64
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S008
S010 · calculation
Before
boundary record0 fixed linear term := mul(-1, -8)
After
boundary record0 fixed linear term = 8
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S009
S011 · calculation
Before
boundary record0 fixed square term := mul(3, 64)
After
boundary record0 fixed square term = 192
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S010
S012 · calculation
Before
boundary record0 constant coefficient := sum(-6, 8, 192)
After
boundary record0 constant coefficient = 194
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S011
S013 · calculation
Before
boundary record0 cross contribution := mul(-1, -8)
After
boundary record0 cross contribution = 8
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S012
S014 · calculation
Before
boundary record0 linear coefficient := sum(3, 8)
After
boundary record0 linear coefficient = 11
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S013
S015 · implies
Before
boundary record0:vary y;fix x=-8;original coefficients=[-6, -1, 3, 3, -1, -1]
After
ascending y slice coefficients=[194, 11, -1]
Conditions: none
Substitute the fixed other coordinate first,collecting constant,linear and quadratic terms separately.The two coordinates do not vary together.
Step identifiers and dependencies
Rule: fixed_other_coordinate_before_derivative · Uses: G001, S014
S016 · calculation
Before
boundary record0 coefficient residual0 := sub(194, 194)
After
boundary record0 coefficient residual0 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S015
S017 · calculation
Before
boundary record0 coefficient residual1 := sub(11, 11)
After
boundary record0 coefficient residual1 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S016
S018 · calculation
Before
boundary record0 coefficient residual2 := sub(-1, -1)
After
boundary record0 coefficient residual2 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S017
S019 · implies
Before
boundary record0:edge=left;bounds=[-8, 8, -7, 9];remaining variable=y;restriction=[194, 11, -1];supplied=[194, 11, -1]
After
all coefficient residuals=[0, 0, 0];polynomial identity=Yes
Conditions: none
Compare all three coefficients of the restriction polynomial,not sampled boundary values.This protocol audits a polynomial identity.If an edge collapses to a point,a coefficient mismatch rejects this stronger certificate but does not by itself refute equality at that single point.
Step identifiers and dependencies
Rule: whole_edge_polynomial_coefficient_certificate · Uses: G001, S018
S020 · calculation
Before
boundary record1 fixed coordinate squared := mul(8, 8)
After
boundary record1 fixed coordinate squared = 64
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S019
S021 · calculation
Before
boundary record1 fixed linear term := mul(-1, 8)
After
boundary record1 fixed linear term = -8
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S020
S022 · calculation
Before
boundary record1 fixed square term := mul(3, 64)
After
boundary record1 fixed square term = 192
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S021
S023 · calculation
Before
boundary record1 constant coefficient := sum(-6, -8, 192)
After
boundary record1 constant coefficient = 178
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S022
S024 · calculation
Before
boundary record1 cross contribution := mul(-1, 8)
After
boundary record1 cross contribution = -8
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S023
S025 · calculation
Before
boundary record1 linear coefficient := sum(3, -8)
After
boundary record1 linear coefficient = -5
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S024
S026 · implies
Before
boundary record1:vary y;fix x=8;original coefficients=[-6, -1, 3, 3, -1, -1]
After
ascending y slice coefficients=[178, -5, -1]
Conditions: none
Substitute the fixed other coordinate first,collecting constant,linear and quadratic terms separately.The two coordinates do not vary together.
Step identifiers and dependencies
Rule: fixed_other_coordinate_before_derivative · Uses: G001, S025
S027 · calculation
Before
boundary record1 coefficient residual0 := sub(178, 178)
After
boundary record1 coefficient residual0 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S026
S028 · calculation
Before
boundary record1 coefficient residual1 := sub(-5, -5)
After
boundary record1 coefficient residual1 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S027
S029 · calculation
Before
boundary record1 coefficient residual2 := sub(-1, -1)
After
boundary record1 coefficient residual2 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S028
S030 · implies
Before
boundary record1:edge=right;bounds=[-8, 8, -7, 9];remaining variable=y;restriction=[178, -5, -1];supplied=[178, -5, -1]
After
all coefficient residuals=[0, 0, 0];polynomial identity=Yes
Conditions: none
Compare all three coefficients of the restriction polynomial,not sampled boundary values.This protocol audits a polynomial identity.If an edge collapses to a point,a coefficient mismatch rejects this stronger certificate but does not by itself refute equality at that single point.
Step identifiers and dependencies
Rule: whole_edge_polynomial_coefficient_certificate · Uses: G001, S029
S031 · calculation
Before
boundary record2 fixed coordinate squared := mul(-7, -7)
After
boundary record2 fixed coordinate squared = 49
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S030
S032 · calculation
Before
boundary record2 fixed linear term := mul(3, -7)
After
boundary record2 fixed linear term = -21
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S031
S033 · calculation
Before
boundary record2 fixed square term := mul(-1, 49)
After
boundary record2 fixed square term = -49
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S032
S034 · calculation
Before
boundary record2 constant coefficient := sum(-6, -21, -49)
After
boundary record2 constant coefficient = -76
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S033
S035 · calculation
Before
boundary record2 cross contribution := mul(-1, -7)
After
boundary record2 cross contribution = 7
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S034
S036 · calculation
Before
boundary record2 linear coefficient := sum(-1, 7)
After
boundary record2 linear coefficient = 6
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S035
S037 · implies
Before
boundary record2:vary x;fix y=-7;original coefficients=[-6, -1, 3, 3, -1, -1]
After
ascending x slice coefficients=[-76, 6, 3]
Conditions: none
Substitute the fixed other coordinate first,collecting constant,linear and quadratic terms separately.The two coordinates do not vary together.
Step identifiers and dependencies
Rule: fixed_other_coordinate_before_derivative · Uses: G001, S036
S038 · calculation
Before
boundary record2 coefficient residual0 := sub(-76, -76)
After
boundary record2 coefficient residual0 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S037
S039 · calculation
Before
boundary record2 coefficient residual1 := sub(6, 6)
After
boundary record2 coefficient residual1 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S038
S040 · calculation
Before
boundary record2 coefficient residual2 := sub(3, 3)
After
boundary record2 coefficient residual2 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S039
S041 · implies
Before
boundary record2:edge=bottom;bounds=[-8, 8, -7, 9];remaining variable=x;restriction=[-76, 6, 3];supplied=[-76, 6, 3]
After
all coefficient residuals=[0, 0, 0];polynomial identity=Yes
Conditions: none
Compare all three coefficients of the restriction polynomial,not sampled boundary values.This protocol audits a polynomial identity.If an edge collapses to a point,a coefficient mismatch rejects this stronger certificate but does not by itself refute equality at that single point.
Step identifiers and dependencies
Rule: whole_edge_polynomial_coefficient_certificate · Uses: G001, S040
S042 · calculation
Before
boundary record3 fixed coordinate squared := mul(9, 9)
After
boundary record3 fixed coordinate squared = 81
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S041
S043 · calculation
Before
boundary record3 fixed linear term := mul(3, 9)
After
boundary record3 fixed linear term = 27
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S042
S044 · calculation
Before
boundary record3 fixed square term := mul(-1, 81)
After
boundary record3 fixed square term = -81
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S043
S045 · calculation
Before
boundary record3 constant coefficient := sum(-6, 27, -81)
After
boundary record3 constant coefficient = -60
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S044
S046 · calculation
Before
boundary record3 cross contribution := mul(-1, 9)
After
boundary record3 cross contribution = -9
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S045
S047 · calculation
Before
boundary record3 linear coefficient := sum(-1, -9)
After
boundary record3 linear coefficient = -10
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S046
S048 · implies
Before
boundary record3:vary x;fix y=9;original coefficients=[-6, -1, 3, 3, -1, -1]
After
ascending x slice coefficients=[-60, -10, 3]
Conditions: none
Substitute the fixed other coordinate first,collecting constant,linear and quadratic terms separately.The two coordinates do not vary together.
Step identifiers and dependencies
Rule: fixed_other_coordinate_before_derivative · Uses: G001, S047
S049 · calculation
Before
boundary record3 coefficient residual0 := sub(-60, -60)
After
boundary record3 coefficient residual0 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S048
S050 · calculation
Before
boundary record3 coefficient residual1 := sub(-10, -10)
After
boundary record3 coefficient residual1 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S049
S051 · calculation
Before
boundary record3 coefficient residual2 := sub(3, 3)
After
boundary record3 coefficient residual2 = 0
Conditions: none
Compute exactly from this step's original roles and established intermediates,retaining signs,denominators and coefficient order.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S050
S052 · implies
Before
boundary record3:edge=top;bounds=[-8, 8, -7, 9];remaining variable=x;restriction=[-60, -10, 3];supplied=[-60, -10, 3]
After
all coefficient residuals=[0, 0, 0];polynomial identity=Yes
Conditions: none
Compare all three coefficients of the restriction polynomial,not sampled boundary values.This protocol audits a polynomial identity.If an edge collapses to a point,a coefficient mismatch rejects this stronger certificate but does not by itself refute equality at that single point.
Step identifiers and dependencies
Rule: whole_edge_polynomial_coefficient_certificate · Uses: G001, S051
S053 · implies
Before
interior identity=No;boundary row flags=[Yes, Yes, Yes, Yes]
After
all boundary identities=Yes;joint certificate=No;state=boundary_pass_interior_fail
Conditions: none
Finish interior and all boundary certificates separately before conjunction.One passing group does not repair another.This audits the declared candidate,not general BVP existence,uniqueness,stability,regularity or well-posedness.
Step identifiers and dependencies
Rule: BVP_two_obligation_groups_conjunction · Uses: G001, S052