Original question and givens
Use vertices=[s0, a0, t0, u0], ordered directed edges=[[s0, a0], [a0, s0], [a0, t0], [t0, a0]], distinct source=s0, sink=t0, aligned capacities=[5, 5, 5, 5] and candidate flows=[4, 2, 3, 1]. Vertices/edges must qualify; capacities are nonnegative. Candidate flows are not assumed feasible. Zip each edge with its own capacity/flow before sorting; never sort those arrays independently. Opposite directions remain distinct; loops and duplicate ordered edges are forbidden. Give (source, sink, edge_capacity_flow_rows, internal_balance_rows, conservation_feasible, first_failed_vertex_or_null, certificate).
G001 — Use vertices=[s0, a0, t0, u0], ordered directed edges=[[s0, a0], [a0, s0], [a0, t0], [t0, a0]], distinct source=s0, sink=t0, aligned capacities=[5, 5, 5, 5] and candidate flows=[4, 2, 3, 1]. Vertices/edges must qualify; capacities are nonnegative. Candidate flows are not assumed feasible. Zip each edge with its own capacity/flow before sorting; never sort those arrays independently. Opposite directions remain distinct; loops and duplicate ordered edges are forbidden. Give (source, sink, edge_capacity_flow_rows, internal_balance_rows, conservation_feasible, first_failed_vertex_or_null, certificate).
Step-by-step derivation
S001 · implies
Before
source roles = [flow-conservation-audit]
After
derived = [[source, sink, edge_capacity_flow_rows, internal_balance_rows, conservation_feasible, first_failed_vertex_or_null, certificate]]
Conditions: none
List the source field order without JavaScript.Gradient boundary uses its original mode to choose6,8 or7 fields;no padding or answer-derived mode.
Step identifiers and dependencies
Rule: source_ordered_fields_without_JS · Uses: G001
S002 · implies
Before
source roles = [[s0, a0, t0, u0], [[s0, a0], [a0, s0], [a0, t0], [t0, a0]], [5, 5, 5, 5], [4, 2, 3, 1], s0, t0]
After
derived = [[a0, s0, t0, u0], [[[a0, s0], 5, 2], [[a0, t0], 5, 3], [[s0, a0], 5, 4], [[t0, a0], 5, 1]], 2, Yes]
Conditions: none
Zip edge,capacity and flow by original index before source English canonical-edge sorting;vertices use UTF16.Opposite directions are distinct,zero capacity and isolated vertices are legal,and negative flow is retained for capacity failure rather than rewritten.
Step identifiers and dependencies
Rule: Flow_zip_source_edges_capacities_flows_BEFORE_order · Uses: G001, S001
S003 · implies
Before
source roles = [0, [a0, s0], 2, 5]
After
derived = [Yes, Yes, Yes]
Conditions: none
Every directed edge needs0<=flow<=capacity.A qualified network signature does not imply candidate-flow feasibility.
Step identifiers and dependencies
Rule: Flow_EACH_edge_two_sided_capacity_obligation · Uses: G001, S002
S004 · implies
Before
source roles = [1, [a0, t0], 3, 5]
After
derived = [Yes, Yes, Yes]
Conditions: none
Every directed edge needs0<=flow<=capacity.A qualified network signature does not imply candidate-flow feasibility.
Step identifiers and dependencies
Rule: Flow_EACH_edge_two_sided_capacity_obligation · Uses: G001, S003
S005 · implies
Before
source roles = [2, [s0, a0], 4, 5]
After
derived = [Yes, Yes, Yes]
Conditions: none
Every directed edge needs0<=flow<=capacity.A qualified network signature does not imply candidate-flow feasibility.
Step identifiers and dependencies
Rule: Flow_EACH_edge_two_sided_capacity_obligation · Uses: G001, S004
S006 · implies
Before
source roles = [3, [t0, a0], 1, 5]
After
derived = [Yes, Yes, Yes]
Conditions: none
Every directed edge needs0<=flow<=capacity.A qualified network signature does not imply candidate-flow feasibility.
Step identifiers and dependencies
Rule: Flow_EACH_edge_two_sided_capacity_obligation · Uses: G001, S005
S007 · calculation
Before
Flow ALL incoming at vertex a0 := sum(4, 1)
After
Flow ALL incoming at vertex a0 = 5
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S006
S008 · calculation
Before
Flow ALL outgoing at vertex a0 := sum(2, 3)
After
Flow ALL outgoing at vertex a0 = 5
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S007
S009 · implies
Before
source roles = [a0, [2, 3], [0, 1]]
After
derived = [5, 5, Yes, Yes]
Conditions: none
Sum all incoming and outgoing edges separately;an isolated vertex has0=0.Conservation is required only internally,but compute source/sink balances too for net values.
Step identifiers and dependencies
Rule: Flow_EACH_vertex_complete_directional_incidence · Uses: G001, S008
S010 · calculation
Before
Flow ALL incoming at vertex s0 := sum(2)
After
Flow ALL incoming at vertex s0 = 2
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S009
S011 · calculation
Before
Flow ALL outgoing at vertex s0 := sum(4)
After
Flow ALL outgoing at vertex s0 = 4
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S010
S012 · implies
Before
source roles = [s0, [0], [2]]
After
derived = [2, 4, No, No]
Conditions: none
Sum all incoming and outgoing edges separately;an isolated vertex has0=0.Conservation is required only internally,but compute source/sink balances too for net values.
Step identifiers and dependencies
Rule: Flow_EACH_vertex_complete_directional_incidence · Uses: G001, S011
S013 · calculation
Before
Flow ALL incoming at vertex t0 := sum(3)
After
Flow ALL incoming at vertex t0 = 3
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S012
S014 · calculation
Before
Flow ALL outgoing at vertex t0 := sum(1)
After
Flow ALL outgoing at vertex t0 = 1
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S013
S015 · implies
Before
source roles = [t0, [1], [3]]
After
derived = [3, 1, No, No]
Conditions: none
Sum all incoming and outgoing edges separately;an isolated vertex has0=0.Conservation is required only internally,but compute source/sink balances too for net values.
Step identifiers and dependencies
Rule: Flow_EACH_vertex_complete_directional_incidence · Uses: G001, S014
S016 · calculation
Before
Flow ALL incoming at vertex u0 := sum()
After
Flow ALL incoming at vertex u0 = 0
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S015
S017 · calculation
Before
Flow ALL outgoing at vertex u0 := sum()
After
Flow ALL outgoing at vertex u0 = 0
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S016
S018 · implies
Before
source roles = [u0, [], []]
After
derived = [0, 0, Yes, Yes]
Conditions: none
Sum all incoming and outgoing edges separately;an isolated vertex has0=0.Conservation is required only internally,but compute source/sink balances too for net values.
Step identifiers and dependencies
Rule: Flow_EACH_vertex_complete_directional_incidence · Uses: G001, S017
S019 · calculation
Before
Flow source NET outflow not gross outgoing := sub(4, 2)
After
Flow source NET outflow not gross outgoing = 2
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S018
S020 · calculation
Before
Flow sink NET inflow not gross incoming := sub(3, 1)
After
Flow sink NET inflow not gross incoming = 2
Conditions: none
Substitute original roles and established intermediates exactly;check nonzero denominators and do not round.
Step identifiers and dependencies
Rule: exact_rational_arithmetic · Uses: G001, S019
S021 · implies
Before
source roles = [s0, t0, [[[a0, s0], 2, 5, Yes], [[a0, t0], 3, 5, Yes], [[s0, a0], 4, 5, Yes], [[t0, a0], 1, 5, Yes]], [[a0, 5, 5, Yes], [u0, 0, 0, Yes]], 2, 2]
After
derived = [Yes, Yes, Yes, Yes, No]
Conditions: none
Every edge cancels in the sum of all vertex balances,so internal conservation implies equal source/sink net values.The converse fails when internal imbalances cancel.Capacity,each balance and net equality remain separate.Feasibility does not certify maximum/min-cut;No does not deny special optimal examples.
Step identifiers and dependencies
Rule: Flow_value_capacity_conservation_and_maximum_separate · Uses: G001, S020
Result
(s0, t0, [[[a0, s0], 5, 2], [[a0, t0], 5, 3], [[s0, a0], 5, 4], [[t0, a0], 5, 1]], [[a0, 5, 5, Yes], [u0, 0, 0, Yes]], Yes, null, every_internal_vertex_requires_complete_inflow_equals_outflow)
The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.