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Theorem mndisass 14717
Description: A monoid is associative.
Assertion
Ref Expression
mndisass |- (G e. Mnd -> G e. Ass)

Proof of Theorem mndisass
StepHypRef Expression
1 mndissmgrp 10386 . 2 |- (G e. Mnd -> G e. SemiGrp)
2 smgrpisass 10380 . 2 |- (G e. SemiGrp -> G e. Ass)
31, 2syl 12 1 |- (G e. Mnd -> G e. Ass)
Colors of variables: wff set class
Syntax hints:   -> wi 3   e. wcel 1300  Asscass 10359  SemiGrpcsem 10377  Mndcmnd 10384
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-ex 1327  df-sb 1536  df-clab 1872  df-cleq 1877  df-clel 1880  df-v 2294  df-in 2603  df-sgr 10378  df-mnd 10385
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