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| Mirrors > Home > ILE Home > Th. List > ghmker | Unicode version | ||
| Description: The kernel of a homomorphism is a normal subgroup. (Contributed by Mario Carneiro, 4-Feb-2015.) |
| Ref | Expression |
|---|---|
| ghmker.1 |
|
| Ref | Expression |
|---|---|
| ghmker |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ghmgrp2 13955 |
. . 3
| |
| 2 | ghmker.1 |
. . . 4
| |
| 3 | 2 | 0nsg 13923 |
. . 3
|
| 4 | 1, 3 | syl 14 |
. 2
|
| 5 | ghmnsgpreima 13978 |
. 2
| |
| 6 | 4, 5 | mpdan 421 |
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 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 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-cnex 8217 ax-resscn 8218 ax-1cn 8219 ax-1re 8220 ax-icn 8221 ax-addcl 8222 ax-addrcl 8223 ax-mulcl 8224 ax-addcom 8226 ax-addass 8228 ax-i2m1 8231 ax-0lt1 8232 ax-0id 8234 ax-rnegex 8235 ax-pre-ltirr 8238 ax-pre-ltadd 8242 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rmo 2528 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-iun 3992 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-pnf 8309 df-mnf 8310 df-ltxr 8312 df-inn 9237 df-2 9295 df-ndx 13207 df-slot 13208 df-base 13210 df-sets 13211 df-iress 13212 df-plusg 13295 df-0g 13463 df-mgm 13561 df-sgrp 13607 df-mnd 13622 df-submnd 13665 df-grp 13708 df-minusg 13709 df-sbg 13710 df-subg 13879 df-nsg 13880 df-ghm 13950 |
| This theorem is referenced by: (None) |
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