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Theorem addassoc
⊦ (a + b) + c = a + b + c
Type: An axiom
Validity: The proof is valid.
Features: ls, s,
Comment:
Used by:
addinv-l
,
addinv-unique
,
addzero-l
,
invmult-l
,
invmult-r
,
invtwice
,
invzero
,
mult-minusone
,
multzero-l
,
multzero-r
,
zero-unique
,
Used by units in proved state:
matrixops
,
Proof exists?: No