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Theorem mgm0 12600
Description: Any set with an empty base set and any group operation is a magma. (Contributed by AV, 28-Aug-2021.)
Assertion
Ref Expression
mgm0  |-  ( ( M  e.  V  /\  ( Base `  M )  =  (/) )  ->  M  e. Mgm )

Proof of Theorem mgm0
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rzal 3506 . . 3  |-  ( (
Base `  M )  =  (/)  ->  A. x  e.  ( Base `  M
) A. y  e.  ( Base `  M
) ( x ( +g  `  M ) y )  e.  (
Base `  M )
)
21adantl 275 . 2  |-  ( ( M  e.  V  /\  ( Base `  M )  =  (/) )  ->  A. x  e.  ( Base `  M
) A. y  e.  ( Base `  M
) ( x ( +g  `  M ) y )  e.  (
Base `  M )
)
3 eqid 2165 . . . 4  |-  ( Base `  M )  =  (
Base `  M )
4 eqid 2165 . . . 4  |-  ( +g  `  M )  =  ( +g  `  M )
53, 4ismgm 12588 . . 3  |-  ( M  e.  V  ->  ( M  e. Mgm  <->  A. x  e.  (
Base `  M ) A. y  e.  ( Base `  M ) ( x ( +g  `  M
) y )  e.  ( Base `  M
) ) )
65adantr 274 . 2  |-  ( ( M  e.  V  /\  ( Base `  M )  =  (/) )  ->  ( M  e. Mgm  <->  A. x  e.  (
Base `  M ) A. y  e.  ( Base `  M ) ( x ( +g  `  M
) y )  e.  ( Base `  M
) ) )
72, 6mpbird 166 1  |-  ( ( M  e.  V  /\  ( Base `  M )  =  (/) )  ->  M  e. Mgm )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    = wceq 1343    e. wcel 2136   A.wral 2444   (/)c0 3409   ` cfv 5188  (class class class)co 5842   Basecbs 12394   +g cplusg 12457  Mgmcmgm 12585
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-cnex 7844  ax-resscn 7845  ax-1re 7847  ax-addrcl 7850
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-int 3825  df-br 3983  df-opab 4044  df-mpt 4045  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-iota 5153  df-fun 5190  df-fn 5191  df-fv 5196  df-ov 5845  df-inn 8858  df-2 8916  df-ndx 12397  df-slot 12398  df-base 12400  df-plusg 12470  df-mgm 12587
This theorem is referenced by: (None)
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