Main derivation
S01 · implies
Before
G=\{e,r,r^2,s,rs,r^2s\}After
\begin{array}{c|cccccc}*&e&r&r^2&s&rs&r^2s\\\hline e&e&r&r^2&s&rs&r^2s\\r&r&r^2&e&rs&r^2s&s\\r^2&r^2&e&r&r^2s&s&rs\\s&s&r^2s&rs&e&r^2&r\\rs&rs&s&r^2s&r&e&r^2\\r^2s&r^2s&rs&s&r^2&r&e\\\end{array}Conditions: none
Rule: calc · Uses: G1
Leaf basis: calc
Expand the pair formula for all 36 products; every output belongs to the same six-element carrier and no cell is missing.
S02 · implies
Before
(i,j)(k,l)=(i+(-1)^jk,j+l)\quad(\bmod(3,2))
After
((i,j)(k,l))(m,n)=(i+(-1)^jk+(-1)^{j+l}m,j+l+n)=(i,j)((k,l)(m,n));\quad e=(0,0);\quad(i,j)^{-1}=(-(-1)^ji,j)Conditions: none
Rule: calc · Uses: G1, S01
Leaf basis: calc
Both bracketings have identical coordinates, proving associativity for all 216 triples; (0,0) is a two-sided identity and the inverse formula multiplies back on both sides.
S03 · implies
Before
|G|=6
After
6=2\cdot3,\quad2,3\text{ prime},\quad2\mid6,3\mid6Conditions: none
Rule: calc · Uses: G1, S01, S02
Leaf basis: calc
The qualified group has six elements and prime divisors exactly 2 and 3, both meeting the theorem premise.
S04 · implies
Before
p=2,\quad g=s
After
s^1=s\ne e,\quad s^2=e\Rightarrow\operatorname{ord}(s)=2Conditions: none
Rule: calc · Uses: G1, S01, S03
Leaf basis: calc
Check the only smaller positive exponent 1 and return at exponent 2, proving exact order 2 rather than merely g^2=e.
S05 · implies
Before
p=3,\quad g=r
After
r^1=r\ne e,\quad r^2\ne e,\quad r^3=e\Rightarrow\operatorname{ord}(r)=3Conditions: none
Rule: calc · Uses: G1, S01, S03
Leaf basis: calc
Both smaller positive powers are nonidentity and the third returns, proving exact order 3.
S06 · implies
Before
g=e,r,r^2,s,rs,r^2s
After
\operatorname{ord}(g)=1,3,3,2,2,2\text{ respectively}Conditions: none
Rule: calc · Uses: G1, S01, S02, S04, S05
Leaf basis: calc
Powers of r^2 are r^2,r,e; each reflection is nonidentity at power 1 and identity at power 2, completing all six orders.
S07 · implies
Before
6\mid|G|,\quad6\notin\{1,2,3\}After
\nexists g\in G:\operatorname{ord}(g)=6Conditions: none
Rule: calc · Uses: G1, S03, S06
Leaf basis: calc
The complete order table excludes an element of composite order 6, showing that the prime conclusion does not extend to every divisor.
S08 · implies
Before
p\in\{2,3\}\text{ prime divisor of }6After
\exists g\in G:\ g^p=e\text{ and }g^k\ne e\ (1\le k<p)Conditions: none
Rule: mko_definition · Uses: G1, S03, S04, S05, S06, S07
Leaf basis: mko_definition
Each prime has a full exact-order witness, certifying Cauchy instances in this model.