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| Mirrors > Home > ILE Home > Th. List > mndbn0 | Unicode version | ||
| Description: The base set of a monoid is not empty. (It is also inhabited, as seen at mndidcl 13723). Statement in [Lang] p. 3. (Contributed by AV, 29-Dec-2023.) |
| Ref | Expression |
|---|---|
| mndbn0.b |
|
| Ref | Expression |
|---|---|
| mndbn0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mndbn0.b |
. . 3
| |
| 2 | eqid 2238 |
. . 3
| |
| 3 | 1, 2 | mndidcl 13723 |
. 2
|
| 4 | 3 | ne0d 3529 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-cnex 8263 ax-resscn 8264 ax-1re 8266 ax-addrcl 8269 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-br 4129 df-opab 4191 df-mpt 4192 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-iota 5335 df-fun 5377 df-fn 5378 df-fv 5383 df-riota 6031 df-ov 6081 df-inn 9287 df-2 9345 df-ndx 13336 df-slot 13337 df-base 13339 df-plusg 13424 df-0g 13592 df-mgm 13656 df-sgrp 13697 df-mnd 13710 |
| This theorem is referenced by: (None) |
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