ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  mndbn0 Unicode version

Theorem mndbn0 13661
Description: The base set of a monoid is not empty. (It is also inhabited, as seen at mndidcl 13660). Statement in [Lang] p. 3. (Contributed by AV, 29-Dec-2023.)
Hypothesis
Ref Expression
mndbn0.b  |-  B  =  ( Base `  G
)
Assertion
Ref Expression
mndbn0  |-  ( G  e.  Mnd  ->  B  =/=  (/) )

Proof of Theorem mndbn0
StepHypRef Expression
1 mndbn0.b . . 3  |-  B  =  ( Base `  G
)
2 eqid 2234 . . 3  |-  ( 0g
`  G )  =  ( 0g `  G
)
31, 2mndidcl 13660 . 2  |-  ( G  e.  Mnd  ->  ( 0g `  G )  e.  B )
43ne0d 3518 1  |-  ( G  e.  Mnd  ->  B  =/=  (/) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1398    e. wcel 2205    =/= wne 2414   (/)c0 3510   ` cfv 5354   Basecbs 13229   0gc0g 13486   Mndcmnd 13646
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324  ax-un 4556  ax-cnex 8220  ax-resscn 8221  ax-1re 8223  ax-addrcl 8226
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3045  df-csb 3141  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-br 4112  df-opab 4174  df-mpt 4175  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-iota 5314  df-fun 5356  df-fn 5357  df-fv 5362  df-riota 6005  df-ov 6055  df-inn 9240  df-2 9298  df-ndx 13232  df-slot 13233  df-base 13235  df-plusg 13320  df-0g 13488  df-mgm 13586  df-sgrp 13632  df-mnd 13647
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator