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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-xpimasn | Structured version Visualization version GIF version | ||
| Description: The image of a singleton, general case. [Change and relabel xpimasn 6185 accordingly, maybe to xpima2sn.] (Contributed by BJ, 6-Apr-2019.) |
| Ref | Expression |
|---|---|
| bj-xpimasn | ⊢ ((𝐴 × 𝐵) “ {𝑋}) = if(𝑋 ∈ 𝐴, 𝐵, ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpima 6182 | . 2 ⊢ ((𝐴 × 𝐵) “ {𝑋}) = if((𝐴 ∩ {𝑋}) = ∅, ∅, 𝐵) | |
| 2 | disjsn 4691 | . . 3 ⊢ ((𝐴 ∩ {𝑋}) = ∅ ↔ ¬ 𝑋 ∈ 𝐴) | |
| 3 | eqid 2734 | . . 3 ⊢ 𝐵 = 𝐵 | |
| 4 | 2, 3 | ifbieq2i 4531 | . 2 ⊢ if((𝐴 ∩ {𝑋}) = ∅, ∅, 𝐵) = if(¬ 𝑋 ∈ 𝐴, ∅, 𝐵) |
| 5 | ifnot 4558 | . 2 ⊢ if(¬ 𝑋 ∈ 𝐴, ∅, 𝐵) = if(𝑋 ∈ 𝐴, 𝐵, ∅) | |
| 6 | 1, 4, 5 | 3eqtri 2761 | 1 ⊢ ((𝐴 × 𝐵) “ {𝑋}) = if(𝑋 ∈ 𝐴, 𝐵, ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1539 ∈ wcel 2107 ∩ cin 3930 ∅c0 4313 ifcif 4505 {csn 4606 × cxp 5663 “ cima 5668 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-sep 5276 ax-nul 5286 ax-pr 5412 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-clab 2713 df-cleq 2726 df-clel 2808 df-ne 2932 df-ral 3051 df-rex 3060 df-rab 3420 df-v 3465 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-nul 4314 df-if 4506 df-sn 4607 df-pr 4609 df-op 4613 df-br 5124 df-opab 5186 df-xp 5671 df-rel 5672 df-cnv 5673 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 |
| This theorem is referenced by: bj-xpima1sn 36916 bj-xpima2sn 36918 |
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