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Step * 1 of Lemma fastpi-property

.....basecase..... 
1. n : ℤ
⊢ |fastpi(0) - π/2(slower)| ≤ (r1/r(10^(20 * 3^0)))
BY
{ Assert ⌜fastpi(0) = (π/2(slower) within 1/10^20) ∈ ℝ⌝⋅ }

1
.....assertion..... 
1. n : ℤ
⊢ fastpi(0) = (π/2(slower) within 1/10^20) ∈ ℝ

2
1. n : ℤ
2. fastpi(0) = (π/2(slower) within 1/10^20) ∈ ℝ
⊢ |fastpi(0) - π/2(slower)| ≤ (r1/r(10^(20 * 3^0)))

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Latex:

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Latex:
.....basecase..... 
1.  n  :  \mBbbZ{}
\mvdash{}  |fastpi(0)  -  \mpi{}/2(slower)|  \mleq{}  (r1/r(10\^{}(20  *  3\^{}0)))


By

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Latex:
Assert  \mkleeneopen{}fastpi(0)  =  (\mpi{}/2(slower)  within  1/10\^{}20)\mkleeneclose{}\mcdot{}

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