Step
*
1
of Lemma
equal-rows-det
1. r : CRng
2. n : ℕ
3. M : Matrix(n;n;r)
4. ∀[i,j:ℕn]. |M| = 0 ∈ |r| supposing (¬(i = j ∈ ℤ)) ∧ (matrix-swap-rows(M;i;j) = M ∈ Matrix(n;n;r))
5. i : ℕn
6. j : ℕn
7. ¬(i = j ∈ ℤ)
8. matrix-swap-rows(M;i;j) = M ∈ Matrix(n;n;r)
⊢ |M| = 0 ∈ |r|
BY
{ (InstHyp [⌜i⌝;⌜j⌝] 4⋅ THEN Auto) }
Latex:
Latex:
1. r : CRng
2. n : \mBbbN{}
3. M : Matrix(n;n;r)
4. \mforall{}[i,j:\mBbbN{}n]. |M| = 0 supposing (\mneg{}(i = j)) \mwedge{} (matrix-swap-rows(M;i;j) = M)
5. i : \mBbbN{}n
6. j : \mBbbN{}n
7. \mneg{}(i = j)
8. matrix-swap-rows(M;i;j) = M
\mvdash{} |M| = 0
By
Latex:
(InstHyp [\mkleeneopen{}i\mkleeneclose{};\mkleeneopen{}j\mkleeneclose{}] 4\mcdot{} THEN Auto)
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