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Theorem ismgmd 41776
Description: Deduce a magma from its properties. (Contributed by AV, 25-Feb-2020.)
Hypotheses
Ref Expression
ismgmd.b  |-  ( ph  ->  B  =  ( Base `  G ) )
ismgmd.0  |-  ( ph  ->  G  e.  V )
ismgmd.p  |-  ( ph  ->  .+  =  ( +g  `  G ) )
ismgmd.c  |-  ( (
ph  /\  x  e.  B  /\  y  e.  B
)  ->  ( x  .+  y )  e.  B
)
Assertion
Ref Expression
ismgmd  |-  ( ph  ->  G  e. Mgm )
Distinct variable groups:    x, y, B    x, G, y    ph, x, y
Allowed substitution hints:    .+ ( x, y)    V( x, y)

Proof of Theorem ismgmd
StepHypRef Expression
1 ismgmd.c . . . . 5  |-  ( (
ph  /\  x  e.  B  /\  y  e.  B
)  ->  ( x  .+  y )  e.  B
)
213expb 1266 . . . 4  |-  ( (
ph  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( x  .+  y
)  e.  B )
32ralrimivva 2971 . . 3  |-  ( ph  ->  A. x  e.  B  A. y  e.  B  ( x  .+  y )  e.  B )
4 ismgmd.b . . . 4  |-  ( ph  ->  B  =  ( Base `  G ) )
5 ismgmd.p . . . . . . 7  |-  ( ph  ->  .+  =  ( +g  `  G ) )
65oveqd 6667 . . . . . 6  |-  ( ph  ->  ( x  .+  y
)  =  ( x ( +g  `  G
) y ) )
76, 4eleq12d 2695 . . . . 5  |-  ( ph  ->  ( ( x  .+  y )  e.  B  <->  ( x ( +g  `  G
) y )  e.  ( Base `  G
) ) )
84, 7raleqbidv 3152 . . . 4  |-  ( ph  ->  ( A. y  e.  B  ( x  .+  y )  e.  B  <->  A. y  e.  ( Base `  G ) ( x ( +g  `  G
) y )  e.  ( Base `  G
) ) )
94, 8raleqbidv 3152 . . 3  |-  ( ph  ->  ( A. x  e.  B  A. y  e.  B  ( x  .+  y )  e.  B  <->  A. x  e.  ( Base `  G ) A. y  e.  ( Base `  G
) ( x ( +g  `  G ) y )  e.  (
Base `  G )
) )
103, 9mpbid 222 . 2  |-  ( ph  ->  A. x  e.  (
Base `  G ) A. y  e.  ( Base `  G ) ( x ( +g  `  G
) y )  e.  ( Base `  G
) )
11 ismgmd.0 . . 3  |-  ( ph  ->  G  e.  V )
12 eqid 2622 . . . 4  |-  ( Base `  G )  =  (
Base `  G )
13 eqid 2622 . . . 4  |-  ( +g  `  G )  =  ( +g  `  G )
1412, 13ismgm 17243 . . 3  |-  ( G  e.  V  ->  ( G  e. Mgm  <->  A. x  e.  (
Base `  G ) A. y  e.  ( Base `  G ) ( x ( +g  `  G
) y )  e.  ( Base `  G
) ) )
1511, 14syl 17 . 2  |-  ( ph  ->  ( G  e. Mgm  <->  A. x  e.  ( Base `  G
) A. y  e.  ( Base `  G
) ( x ( +g  `  G ) y )  e.  (
Base `  G )
) )
1610, 15mpbird 247 1  |-  ( ph  ->  G  e. Mgm )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 196    /\ w3a 1037    = wceq 1483    e. wcel 1990   A.wral 2912   ` cfv 5888  (class class class)co 6650   Basecbs 15857   +g cplusg 15941  Mgmcmgm 17240
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-mgm 17242
This theorem is referenced by:  issubmgm2  41790
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