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| Mirrors > Home > MPE Home > Th. List > Mathboxes > br1cnvres | Structured version Visualization version GIF version | ||
| Description: Binary relation on the converse of a restriction. (Contributed by Peter Mazsa, 27-Jul-2019.) |
| Ref | Expression |
|---|---|
| br1cnvres | ⊢ (𝐵 ∈ 𝑉 → (𝐵◡(𝑅 ↾ 𝐴)𝐶 ↔ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-res 5635 | . . . 4 ⊢ (𝑅 ↾ 𝐴) = (𝑅 ∩ (𝐴 × V)) | |
| 2 | 1 | cnveqi 5822 | . . 3 ⊢ ◡(𝑅 ↾ 𝐴) = ◡(𝑅 ∩ (𝐴 × V)) |
| 3 | 2 | breqi 5103 | . 2 ⊢ (𝐵◡(𝑅 ↾ 𝐴)𝐶 ↔ 𝐵◡(𝑅 ∩ (𝐴 × V))𝐶) |
| 4 | elex 3460 | . . 3 ⊢ (𝐵 ∈ 𝑉 → 𝐵 ∈ V) | |
| 5 | br1cnvinxp 38429 | . . . . 5 ⊢ (𝐵◡(𝑅 ∩ (𝐴 × V))𝐶 ↔ ((𝐵 ∈ V ∧ 𝐶 ∈ 𝐴) ∧ 𝐶𝑅𝐵)) | |
| 6 | anass 468 | . . . . 5 ⊢ (((𝐵 ∈ V ∧ 𝐶 ∈ 𝐴) ∧ 𝐶𝑅𝐵) ↔ (𝐵 ∈ V ∧ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) | |
| 7 | 5, 6 | bitri 275 | . . . 4 ⊢ (𝐵◡(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐵 ∈ V ∧ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) |
| 8 | 7 | baib 535 | . . 3 ⊢ (𝐵 ∈ V → (𝐵◡(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) |
| 9 | 4, 8 | syl 17 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐵◡(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) |
| 10 | 3, 9 | bitrid 283 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐵◡(𝑅 ↾ 𝐴)𝐶 ↔ (𝐶 ∈ 𝐴 ∧ 𝐶𝑅𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 Vcvv 3439 ∩ cin 3899 class class class wbr 5097 × cxp 5621 ◡ccnv 5622 ↾ cres 5625 |
| 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-ext 2707 ax-sep 5240 ax-nul 5250 ax-pr 5376 |
| 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-sb 2069 df-clab 2714 df-cleq 2727 df-clel 2810 df-ral 3051 df-rex 3060 df-rab 3399 df-v 3441 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-nul 4285 df-if 4479 df-sn 4580 df-pr 4582 df-op 4586 df-br 5098 df-opab 5160 df-xp 5629 df-rel 5630 df-cnv 5631 df-res 5635 |
| This theorem is referenced by: elec1cnvres 38445 coss1cnvres 38677 |
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