Theorem imaelfm 22243

Description: An image of a filter element is in the image filter. (Contributed by Jeff Hankins, 5-Oct-2009.) (Revised by Stefan O'Rear, 6-Aug-2015.)

Hypothesis

Ref	Expression
imaelfm.l	⊢ 𝐿 = (𝑌filGen𝐵)

Assertion

Ref	Expression
imaelfm	⊢ (((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑆 ∈ 𝐿) → (𝐹 “ 𝑆) ∈ ((𝑋 FilMap 𝐹)‘𝐵))

Proof of Theorem imaelfm

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		fimass 6423	. . . 4 ⊢ (𝐹:𝑌⟶𝑋 → (𝐹 “ 𝑆) ⊆ 𝑋)
2	1	3ad2ant3 1128	. . 3 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐹 “ 𝑆) ⊆ 𝑋)
3		ssid 3910	. . . 4 ⊢ (𝐹 “ 𝑆) ⊆ (𝐹 “ 𝑆)
4		imaeq2 5802	. . . . . 6 ⊢ (𝑥 = 𝑆 → (𝐹 “ 𝑥) = (𝐹 “ 𝑆))
5	4	sseq1d 3919	. . . . 5 ⊢ (𝑥 = 𝑆 → ((𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆) ↔ (𝐹 “ 𝑆) ⊆ (𝐹 “ 𝑆)))
6	5	rspcev 3559	. . . 4 ⊢ ((𝑆 ∈ 𝐿 ∧ (𝐹 “ 𝑆) ⊆ (𝐹 “ 𝑆)) → ∃𝑥 ∈ 𝐿 (𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆))
7	3, 6	mpan2 687	. . 3 ⊢ (𝑆 ∈ 𝐿 → ∃𝑥 ∈ 𝐿 (𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆))
8	2, 7	anim12i 612	. 2 ⊢ (((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑆 ∈ 𝐿) → ((𝐹 “ 𝑆) ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐿 (𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆)))
9		imaelfm.l	. . . 4 ⊢ 𝐿 = (𝑌filGen𝐵)
10	9	elfm2 22240	. . 3 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝐹 “ 𝑆) ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ((𝐹 “ 𝑆) ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐿 (𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆))))
11	10	adantr 481	. 2 ⊢ (((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑆 ∈ 𝐿) → ((𝐹 “ 𝑆) ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ((𝐹 “ 𝑆) ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐿 (𝐹 “ 𝑥) ⊆ (𝐹 “ 𝑆))))
12	8, 11	mpbird 258	1 ⊢ (((𝑋 ∈ 𝐴 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑆 ∈ 𝐿) → (𝐹 “ 𝑆) ∈ ((𝑋 FilMap 𝐹)‘𝐵))

Syntax hints:   → wi 4   ↔ wb 207   ∧ wa 396   ∧ w3a 1080   = wceq 1522   ∈ wcel 2081  ∃wrex 3106   ⊆ wss 3859   “ cima 5446  ⟶wf 6221  ‘cfv 6225  (class class class)co 7016  fBascfbas 20215  filGencfg 20216   FilMap cfm 22225

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1777  ax-4 1791  ax-5 1888  ax-6 1947  ax-7 1992  ax-8 2083  ax-9 2091  ax-10 2112  ax-11 2126  ax-12 2141  ax-13 2344  ax-ext 2769  ax-rep 5081  ax-sep 5094  ax-nul 5101  ax-pow 5157  ax-pr 5221  ax-un 7319

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 843  df-3an 1082  df-tru 1525  df-ex 1762  df-nf 1766  df-sb 2043  df-mo 2576  df-eu 2612  df-clab 2776  df-cleq 2788  df-clel 2863  df-nfc 2935  df-ne 2985  df-nel 3091  df-ral 3110  df-rex 3111  df-reu 3112  df-rab 3114  df-v 3439  df-sbc 3707  df-csb 3812  df-dif 3862  df-un 3864  df-in 3866  df-ss 3874  df-nul 4212  df-if 4382  df-pw 4455  df-sn 4473  df-pr 4475  df-op 4479  df-uni 4746  df-iun 4827  df-br 4963  df-opab 5025  df-mpt 5042  df-id 5348  df-xp 5449  df-rel 5450  df-cnv 5451  df-co 5452  df-dm 5453  df-rn 5454  df-res 5455  df-ima 5456  df-iota 6189  df-fun 6227  df-fn 6228  df-f 6229  df-f1 6230  df-fo 6231  df-f1o 6232  df-fv 6233  df-ov 7019  df-oprab 7020  df-mpo 7021  df-fbas 20224  df-fg 20225  df-fm 22230

This theorem is referenced by:  rnelfm  22245  fmfnfmlem2  22247  fmfnfmlem4  22249  fmfnfm  22250  fmco  22253  isfcf  22326  cnextcn  22359