| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > wdomen2 | Structured version Visualization version GIF version | ||
| Description: Equality-like theorem for equinumerosity and weak dominance. (Contributed by Mario Carneiro, 18-May-2015.) |
| Ref | Expression |
|---|---|
| wdomen2 | ⊢ (𝐴 ≈ 𝐵 → (𝐶 ≼* 𝐴 ↔ 𝐶 ≼* 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 22 | . . 3 ⊢ (𝐶 ≼* 𝐴 → 𝐶 ≼* 𝐴) | |
| 2 | endom 8960 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ≼ 𝐵) | |
| 3 | domwdom 9522 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ≼* 𝐵) | |
| 4 | 2, 3 | syl 17 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ≼* 𝐵) |
| 5 | wdomtr 9523 | . . 3 ⊢ ((𝐶 ≼* 𝐴 ∧ 𝐴 ≼* 𝐵) → 𝐶 ≼* 𝐵) | |
| 6 | 1, 4, 5 | syl2anr 606 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≼* 𝐴) → 𝐶 ≼* 𝐵) |
| 7 | id 22 | . . 3 ⊢ (𝐶 ≼* 𝐵 → 𝐶 ≼* 𝐵) | |
| 8 | ensym 8984 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
| 9 | endom 8960 | . . . 4 ⊢ (𝐵 ≈ 𝐴 → 𝐵 ≼ 𝐴) | |
| 10 | domwdom 9522 | . . . 4 ⊢ (𝐵 ≼ 𝐴 → 𝐵 ≼* 𝐴) | |
| 11 | 8, 9, 10 | 3syl 18 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≼* 𝐴) |
| 12 | wdomtr 9523 | . . 3 ⊢ ((𝐶 ≼* 𝐵 ∧ 𝐵 ≼* 𝐴) → 𝐶 ≼* 𝐴) | |
| 13 | 7, 11, 12 | syl2anr 606 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≼* 𝐵) → 𝐶 ≼* 𝐴) |
| 14 | 6, 13 | impbida 810 | 1 ⊢ (𝐴 ≈ 𝐵 → (𝐶 ≼* 𝐴 ↔ 𝐶 ≼* 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 class class class wbr 5100 ≈ cen 8924 ≼ cdom 8925 ≼* cwdom 9512 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-wdom 9513 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |