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Step * 1 of Lemma same-parity-implies

.....truecase..... 
1. n : ℤ
2. m : ℤ
3. ↑isEven(m)
4. ↑isEven(n)
5. ↑isEven(n)
⊢ ¬↑isEven(m - 1)
BY
{ (FLemma `even-implies` [-3] THEN Auto THEN FLemma `odd-implies` [-3] THEN Auto) }

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Latex:

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Latex:
.....truecase..... 
1.  n  :  \mBbbZ{}
2.  m  :  \mBbbZ{}
3.  \muparrow{}isEven(m)
4.  \muparrow{}isEven(n)
5.  \muparrow{}isEven(n)
\mvdash{}  \mneg{}\muparrow{}isEven(m  -  1)


By

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Latex:
(FLemma  `even-implies`  [-3]  THEN  Auto  THEN  FLemma  `odd-implies`  [-3]  THEN  Auto)

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