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| Mirrors > Home > MPE Home > Th. List > mptsuppd | Structured version Visualization version GIF version | ||
| Description: The support of a function in maps-to notation. (Contributed by AV, 10-Apr-2019.) (Revised by AV, 28-May-2019.) |
| Ref | Expression |
|---|---|
| mptsuppdifd.f | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| mptsuppdifd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| mptsuppdifd.z | ⊢ (𝜑 → 𝑍 ∈ 𝑊) |
| mptsuppd.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑈) |
| Ref | Expression |
|---|---|
| mptsuppd | ⊢ (𝜑 → (𝐹 supp 𝑍) = {𝑥 ∈ 𝐴 ∣ 𝐵 ≠ 𝑍}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mptsuppdifd.f | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 2 | mptsuppdifd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 3 | mptsuppdifd.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑊) | |
| 4 | 1, 2, 3 | mptsuppdifd 8161 | . 2 ⊢ (𝜑 → (𝐹 supp 𝑍) = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (V ∖ {𝑍})}) |
| 5 | eldifsn 4745 | . . . 4 ⊢ (𝐵 ∈ (V ∖ {𝑍}) ↔ (𝐵 ∈ V ∧ 𝐵 ≠ 𝑍)) | |
| 6 | mptsuppd.b | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑈) | |
| 7 | 6 | elexd 3476 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ V) |
| 8 | 7 | biantrurd 540 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 ≠ 𝑍 ↔ (𝐵 ∈ V ∧ 𝐵 ≠ 𝑍))) |
| 9 | 5, 8 | bitr4id 292 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 ∈ (V ∖ {𝑍}) ↔ 𝐵 ≠ 𝑍)) |
| 10 | 9 | rabbidva 3419 | . 2 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (V ∖ {𝑍})} = {𝑥 ∈ 𝐴 ∣ 𝐵 ≠ 𝑍}) |
| 11 | 4, 10 | eqtrd 2796 | 1 ⊢ (𝜑 → (𝐹 supp 𝑍) = {𝑥 ∈ 𝐴 ∣ 𝐵 ≠ 𝑍}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 {crab 3413 Vcvv 3453 ∖ cdif 3901 {csn 4581 ↦ cmpt 5180 (class class class)co 7392 supp csupp 8135 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5540 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-ov 7395 df-oprab 7396 df-mpo 7397 df-supp 8136 |
| This theorem is referenced by: rmsupp0 48954 domnmsuppn0 48955 rmsuppss 48956 suppmptcfin 48962 lcoc0 49008 linc1 49011 |
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