Step
*
2
1
1
2
2
1
of Lemma
maxsegsum_singleton
1. x : 
@i
 x = initseg_sum(0;[x])
BY
{ (InstLemma `initseg_sum0` [
x
;
[]
]
 THENA Auto) }
1
1. x : 
@i
2. initseg_sum(0;[x]) = x
 x = initseg_sum(0;[x])
Latex:
1.  x  :  \mBbbZ{}@i
\mvdash{}  x  =  initseg\_sum(0;[x])
By
(InstLemma  `initseg\_sum0`  [\mkleeneopen{}x\mkleeneclose{};\mkleeneopen{}[]\mkleeneclose{}]\mcdot{}  THENA  Auto)
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