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Proof step 869 from proof bitsand-cast (previous step)

mklist(true, # bits1) = bits1, true ∈ bits1 ⊦ bits2 + bits1 = [], bits0 = [], lastn(# bits1, fillsgn(# bits1, bitsand(sgn(bits1), bits0))) = lastn(# bits1, fillsgn(# bits1, bitsand(bits2 + bits1, bits0)))

User applied rule insert equation

And obtained the following new goals

Proof step 870:
mklist(true, # bits1) = bits1, true ∈ mklist(true, # bits1) ⊦ bits2 + mklist(true, # bits1) = [], bits0 = [], lastn(# mklist(true, # bits1), fillsgn(# mklist(true, # bits1), bitsand(sgn(mklist(true, # bits1)), bits0))) = lastn(# mklist(true, # bits1), fillsgn(# mklist(true, # bits1), bitsand(bits2 + mklist(true, # bits1), bits0)))

Rule argument

pos: left 1 flags: rotate

Proof step 869 from proof bitsand-cast (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information