Theorem lspun0 14573

Description: The span of a union with the zero subspace. (Contributed by NM, 22-May-2015.)

Hypotheses

Ref	Expression
lspun0.v	|- V = ( Base ` W )
lspun0.o	|- .0. = ( 0g ` W )
lspun0.n	|- N = ( LSpan ` W )
lspun0.w	|- ( ph -> W e. LMod )
lspun0.x	|- ( ph -> X C_ V )

Assertion

Ref	Expression
lspun0	|- ( ph -> ( N ` ( X u. { .0. } ) ) = ( N ` X ) )

Proof of Theorem lspun0

Step	Hyp	Ref	Expression
1		lspun0.w	. . 3 |- ( ph -> W e. LMod )
2		lspun0.x	. . 3 |- ( ph -> X C_ V )
3		lspun0.v	. . . . . 6 |- V = ( Base ` W )
4		lspun0.o	. . . . . 6 |- .0. = ( 0g ` W )
5	3, 4	lmod0vcl 14465	. . . . 5 |- ( W e. LMod -> .0. e. V )
6	1, 5	syl 14	. . . 4 |- ( ph -> .0. e. V )
7	6	snssd 3839	. . 3 |- ( ph -> { .0. } C_ V )
8		lspun0.n	. . . 4 |- N = ( LSpan ` W )
9	3, 8	lspun 14550	. . 3 |- ( ( W e. LMod /\ X C_ V /\ { .0. } C_ V ) -> ( N ` ( X u. { .0. } ) ) = ( N ` ( ( N ` X ) u. ( N ` { .0. } ) ) ) )
10	1, 2, 7, 9	syl3anc 1274	. 2 |- ( ph -> ( N ` ( X u. { .0. } ) ) = ( N ` ( ( N ` X ) u. ( N ` { .0. } ) ) ) )
11	4, 8	lspsn0 14570	. . . . . . 7 |- ( W e. LMod -> ( N ` { .0. } ) = { .0. } )
12	1, 11	syl 14	. . . . . 6 |- ( ph -> ( N ` { .0. } ) = { .0. } )
13	12	uneq2d 3373	. . . . 5 |- ( ph -> ( ( N ` X ) u. ( N ` { .0. } ) ) = ( ( N ` X ) u. { .0. } ) )
14		eqid 2232	. . . . . . . . 9 |- ( LSubSp ` W ) = ( LSubSp ` W )
15	3, 14, 8	lspcl 14539	. . . . . . . 8 |- ( ( W e. LMod /\ X C_ V ) -> ( N ` X ) e. ( LSubSp ` W ) )
16	1, 2, 15	syl2anc 411	. . . . . . 7 |- ( ph -> ( N ` X ) e. ( LSubSp ` W ) )
17	4, 14	lss0ss 14519	. . . . . . 7 |- ( ( W e. LMod /\ ( N ` X ) e. ( LSubSp ` W ) ) -> { .0. } C_ ( N ` X ) )
18	1, 16, 17	syl2anc 411	. . . . . 6 |- ( ph -> { .0. } C_ ( N ` X ) )
19		ssequn2 3392	. . . . . 6 |- ( { .0. } C_ ( N ` X ) <-> ( ( N ` X ) u. { .0. } ) = ( N ` X ) )
20	18, 19	sylib 122	. . . . 5 |- ( ph -> ( ( N ` X ) u. { .0. } ) = ( N ` X ) )
21	13, 20	eqtrd 2265	. . . 4 |- ( ph -> ( ( N ` X ) u. ( N ` { .0. } ) ) = ( N ` X ) )
22	21	fveq2d 5674	. . 3 |- ( ph -> ( N ` ( ( N ` X ) u. ( N ` { .0. } ) ) ) = ( N ` ( N ` X ) ) )
23	3, 8	lspidm 14549	. . . 4 |- ( ( W e. LMod /\ X C_ V ) -> ( N ` ( N ` X ) ) = ( N ` X ) )
24	1, 2, 23	syl2anc 411	. . 3 |- ( ph -> ( N ` ( N ` X ) ) = ( N ` X ) )
25	22, 24	eqtrd 2265	. 2 |- ( ph -> ( N ` ( ( N ` X ) u. ( N ` { .0. } ) ) ) = ( N ` X ) )
26	10, 25	eqtrd 2265	1 |- ( ph -> ( N ` ( X u. { .0. } ) ) = ( N ` X ) )

Syntax hints:   -> wi 4   = wceq 1398   e. wcel 2203   u. cun 3209   C_ wss 3211   {csn 3689   ` cfv 5352   Basecbs 13212   0gc0g 13469   LModclmod 14435   LSubSpclss 14500   LSpanclspn 14534

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 4225  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-pre-ltirr 8239  ax-pre-ltadd 8243

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 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-1st 6334  df-2nd 6335  df-pnf 8310  df-mnf 8311  df-ltxr 8313  df-inn 9238  df-2 9296  df-3 9297  df-4 9298  df-5 9299  df-6 9300  df-ndx 13215  df-slot 13216  df-base 13218  df-sets 13219  df-plusg 13303  df-mulr 13304  df-sca 13306  df-vsca 13307  df-0g 13471  df-mgm 13569  df-sgrp 13615  df-mnd 13630  df-grp 13716  df-minusg 13717  df-sbg 13718  df-mgp 14065  df-ur 14104  df-ring 14142  df-lmod 14437  df-lssm 14501  df-lsp 14535

This theorem is referenced by: (None)