Theorem mptsuppdifd 8049

Description: The support of a function in maps-to notation with a class difference. (Contributed by AV, 28-May-2019.)

Hypotheses

Ref	Expression
mptsuppdifd.f	⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵)
mptsuppdifd.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
mptsuppdifd.z	⊢ (𝜑 → 𝑍 ∈ 𝑊)

Assertion

Ref	Expression
mptsuppdifd	⊢ (𝜑 → (𝐹 supp 𝑍) = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (V ∖ {𝑍})})

Distinct variable groups:   𝑥,𝐴   𝑥,𝑍

Allowed substitution hints:   𝜑(𝑥)   𝐵(𝑥)   𝐹(𝑥)   𝑉(𝑥)   𝑊(𝑥)

Proof of Theorem mptsuppdifd

Step	Hyp	Ref	Expression
1		mptsuppdifd.f	. . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵)
2		mptsuppdifd.a	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
3	2	mptexd 7139	. . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ V)
4	1, 3	eqeltrid 2842	. . 3 ⊢ (𝜑 → 𝐹 ∈ V)
5		mptsuppdifd.z	. . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑊)
6		suppimacnv 8037	. . 3 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ 𝑊) → (𝐹 supp 𝑍) = (◡𝐹 “ (V ∖ {𝑍})))
7	4, 5, 6	syl2anc 584	. 2 ⊢ (𝜑 → (𝐹 supp 𝑍) = (◡𝐹 “ (V ∖ {𝑍})))
8	1	mptpreima 6163	. 2 ⊢ (◡𝐹 “ (V ∖ {𝑍})) = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (V ∖ {𝑍})}
9	7, 8	eqtrdi 2793	1 ⊢ (𝜑 → (𝐹 supp 𝑍) = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (V ∖ {𝑍})})

Syntax hints:   → wi 4   = wceq 1540   ∈ wcel 2105  {crab 3404  Vcvv 3441   ∖ cdif 3894  {csn 4571   ↦ cmpt 5170  ^◡ccnv 5606   “ cima 5610  (class class class)co 7315   supp csupp 8024

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1912  ax-6 1970  ax-7 2010  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2153  ax-12 2170  ax-ext 2708  ax-rep 5224  ax-sep 5238  ax-nul 5245  ax-pr 5367  ax-un 7628

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1781  df-nf 1785  df-sb 2067  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2815  df-nfc 2887  df-ne 2942  df-ral 3063  df-rex 3072  df-reu 3351  df-rab 3405  df-v 3443  df-sbc 3727  df-csb 3843  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-nul 4268  df-if 4472  df-sn 4572  df-pr 4574  df-op 4578  df-uni 4851  df-iun 4939  df-br 5088  df-opab 5150  df-mpt 5171  df-id 5507  df-xp 5613  df-rel 5614  df-cnv 5615  df-co 5616  df-dm 5617  df-rn 5618  df-res 5619  df-ima 5620  df-iota 6417  df-fun 6467  df-fn 6468  df-f 6469  df-f1 6470  df-fo 6471  df-f1o 6472  df-fv 6473  df-ov 7318  df-oprab 7319  df-mpo 7320  df-supp 8025

This theorem is referenced by:  mptsuppd  8050  extmptsuppeq  8051  suppssov1  8061  suppss2  8063  suppssfv  8065