| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > wdomref | Structured version Visualization version GIF version | ||
| Description: Reflexivity of weak dominance. (Contributed by Stefan O'Rear, 11-Feb-2015.) |
| Ref | Expression |
|---|---|
| wdomref | ⊢ (𝑋 ∈ 𝑉 → 𝑋 ≼* 𝑋) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resiexg 7948 | . 2 ⊢ (𝑋 ∈ 𝑉 → ( I ↾ 𝑋) ∈ V) | |
| 2 | f1oi 6886 | . . 3 ⊢ ( I ↾ 𝑋):𝑋⟶1-1onto𝑋 | |
| 3 | f1ofo 6854 | . . 3 ⊢ (( I ↾ 𝑋):𝑋⟶1-1onto𝑋 → ( I ↾ 𝑋):𝑋⟶onto𝑋) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ ( I ↾ 𝑋):𝑋⟶onto𝑋 |
| 5 | fowdom 9592 | . 2 ⊢ ((( I ↾ 𝑋) ∈ V ∧ ( I ↾ 𝑋):𝑋⟶onto𝑋) → 𝑋 ≼* 𝑋) | |
| 6 | 1, 4, 5 | sylancl 598 | 1 ⊢ (𝑋 ∈ 𝑉 → 𝑋 ≼* 𝑋) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 Vcvv 3454 class class class wbr 5106 I cid 5549 ↾ cres 5657 ⟶ontowfo 6556 ⟶1-1ontowf1o 6557 ≼* cwdom 9585 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-wdom 9586 |
| This theorem is used by: hsmexlem3 10533 hsmexlem5 10535 |
| Copyright terms: Public domain | W3C validator |