Theorem srgcmn 18508

Description: A semiring is a commutative monoid. (Contributed by Thierry Arnoux, 21-Mar-2018.)

Assertion

Ref	Expression
srgcmn	|- ( R e. SRing -> R e. CMnd )

Proof of Theorem srgcmn

Dummy variables x y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2622	. . 3 |- ( Base ` R ) = ( Base ` R )
2		eqid 2622	. . 3 |- (mulGrp ` R ) = (mulGrp ` R )
3		eqid 2622	. . 3 |- ( +g ` R ) = ( +g ` R )
4		eqid 2622	. . 3 |- ( .r ` R ) = ( .r ` R )
5		eqid 2622	. . 3 |- ( 0g ` R ) = ( 0g ` R )
6	1, 2, 3, 4, 5	issrg 18507	. 2 |- ( R e. SRing <-> ( R e. CMnd /\ (mulGrp ` R ) e. Mnd /\ A. x e. ( Base ` R ) ( A. y e. ( Base ` R ) A. z e. ( Base ` R ) ( ( x ( .r ` R ) ( y ( +g ` R ) z ) ) = ( ( x ( .r ` R ) y ) ( +g ` R ) ( x ( .r ` R ) z ) ) /\ ( ( x ( +g ` R ) y ) ( .r ` R ) z ) = ( ( x ( .r ` R ) z ) ( +g ` R ) ( y ( .r ` R ) z ) ) ) /\ ( ( ( 0g ` R ) ( .r ` R ) x ) = ( 0g ` R ) /\ ( x ( .r ` R ) ( 0g ` R ) ) = ( 0g ` R ) ) ) ) )
7	6	simp1bi 1076	1 |- ( R e. SRing -> R e. CMnd )

Syntax hints:   -> wi 4   /\ wa 384   = wceq 1483   e. wcel 1990   A.wral 2912   ` cfv 5888  (class class class)co 6650   Basecbs 15857   +g cplusg 15941   .rcmulr 15942   0gc0g 16100   Mndcmnd 17294  CMndccmn 18193  mulGrpcmgp 18489  SRingcsrg 18505

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-nul 4789

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-iota 5851  df-fv 5896  df-ov 6653  df-srg 18506

This theorem is referenced by:  srgmnd  18509  srgcom  18525  srgsummulcr  18537  sgsummulcl  18538  srgbinomlem3  18542  srgbinomlem4  18543  srgbinomlem  18544  gsumvsca2  29783