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| Mirrors > Home > MPE Home > Th. List > eluniima | Structured version Visualization version GIF version | ||
| Description: Membership in the union of an image of a function. (Contributed by NM, 28-Sep-2006.) |
| Ref | Expression |
|---|---|
| eluniima | ⊢ (Fun 𝐹 → (𝐵 ∈ ∪ (𝐹 “ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ (𝐹‘𝑥))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funiunfv 7194 | . . 3 ⊢ (Fun 𝐹 → ∪ 𝑥 ∈ 𝐴 (𝐹‘𝑥) = ∪ (𝐹 “ 𝐴)) | |
| 2 | 1 | eleq2d 2823 | . 2 ⊢ (Fun 𝐹 → (𝐵 ∈ ∪ 𝑥 ∈ 𝐴 (𝐹‘𝑥) ↔ 𝐵 ∈ ∪ (𝐹 “ 𝐴))) |
| 3 | eliun 4938 | . 2 ⊢ (𝐵 ∈ ∪ 𝑥 ∈ 𝐴 (𝐹‘𝑥) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ (𝐹‘𝑥)) | |
| 4 | 2, 3 | bitr3di 286 | 1 ⊢ (Fun 𝐹 → (𝐵 ∈ ∪ (𝐹 “ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ (𝐹‘𝑥))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2114 ∃wrex 3062 ∪ cuni 4851 ∪ ciun 4934 “ cima 5625 Fun wfun 6484 ‘cfv 6490 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-fv 6498 |
| This theorem is referenced by: elunirnALT 7198 ttrclse 9637 alephfp 10019 acsficl2d 18476 isconstr 33886 r1filimi 35252 r1filim 35253 r1omfi 35254 r1omhf 35255 elhf 36362 ttctr 36681 dfttc2g 36694 |
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