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Proof step 65 from proof shiftright-rec-neg (previous step)

i→n(j) = i→n(abs(j)), int2bits(i % 2).butlast = [], abs(j) = 1, i < ~1, i < 0 ⊦ i→n(j) + # int2bits(i % 2) = 0, int2bits((i - 1) / 2) + int2bits(i % 2) = [], j = 0, bits2int(true ' + firstn(# int2bits((i - 1) / 2), mklist(true, i→n(j) - 1) + int2bits((i - 1) / 2))) = (i - 1) / 2

User applied rule insert equation

And obtained the following new goals

Proof step 66:
int2bits(i % 2).butlast = [], abs(j) = 1, i < ~1, i < 0 ⊦ i→n(abs(j)) + # int2bits(i % 2) = 0, int2bits((i - 1) / 2) + int2bits(i % 2) = [], j = 0, bits2int(true ' + firstn(# int2bits((i - 1) / 2), mklist(true, i→n(abs(j)) - 1) + int2bits((i - 1) / 2))) = (i - 1) / 2

Rule argument

pos: left 1 flags: discard

Proof step 65 from proof shiftright-rec-neg (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information