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Step * 1 1 of Lemma rexp0

.....assertion..... 
1. Σn.(r0^n)/(n)! = e^r0
⊢ Σi.(r0^i)/(i)! = r1
BY
{ (Assert ⌜Σi.if (i =z 0) then r1 else r0 fi  = r1⌝⋅ THENA Auto) }

1
1. Σn.(r0^n)/(n)! = e^r0
2. Σi.if (i =z 0) then r1 else r0 fi  = r1
⊢ Σi.(r0^i)/(i)! = r1

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Latex:

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Latex:
.....assertion..... 
1.  \mSigma{}n.(r0\^{}n)/(n)!  =  e\^{}r0
\mvdash{}  \mSigma{}i.(r0\^{}i)/(i)!  =  r1


By

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Latex:
(Assert  \mkleeneopen{}\mSigma{}i.if  (i  =\msubz{}  0)  then  r1  else  r0  fi    =  r1\mkleeneclose{}\mcdot{}  THENA  Auto)

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