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| Mirrors > Home > MPE Home > Th. List > dmmptd | Structured version Visualization version GIF version | ||
| Description: The domain of the mapping operation, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| dmmptd.a | ⊢ 𝐴 = (𝑥 ∈ 𝐵 ↦ 𝐶) |
| dmmptd.c | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| dmmptd | ⊢ (𝜑 → dom 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmptd.a | . . 3 ⊢ 𝐴 = (𝑥 ∈ 𝐵 ↦ 𝐶) | |
| 2 | 1 | dmmpt 6244 | . 2 ⊢ dom 𝐴 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V} |
| 3 | dmmptd.c | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ 𝑉) | |
| 4 | 3 | elexd 3473 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ V) |
| 5 | 4 | ralrimiva 3154 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 𝐶 ∈ V) |
| 6 | rabid2 3444 | . . 3 ⊢ (𝐵 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V} ↔ ∀𝑥 ∈ 𝐵 𝐶 ∈ V) | |
| 7 | 5, 6 | sylibr 237 | . 2 ⊢ (𝜑 → 𝐵 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V}) |
| 8 | 2, 7 | eqtr4id 2814 | 1 ⊢ (𝜑 → dom 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ∀wral 3076 {crab 3412 Vcvv 3450 ↦ cmpt 5185 dom cdm 5651 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-mpt 5186 df-xp 5657 df-rel 5658 df-cnv 5659 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 |
| This theorem is used by: lo1eq 15744 rlimeq 15745 rlimcld2 15754 rlimcn3 15766 rlimmptrcl 15784 rlimsqzlem 15825 dprdz 20255 alexsublem 24372 cmetcaulem 25618 minveclem3b 25758 mbfneg 25980 mbfsup 25994 mbfinf 25995 mbflimsup 25996 itg2monolem1 26080 itg2mono 26083 itg2i1fseq2 26086 itg2cnlem1 26091 isibl2 26096 iblcnlem 26118 limccnp2 26221 limcco 26222 dvmptres3 26285 itgsubstlem 26377 iblulm 26743 rlimcnp2 27303 dchrisumlema 27824 htthlem 31528 qusrn 34010 esplyfvaln 34256 extdgfialglem1 34374 algextdeglem4 34402 dmqmap 39522 expgrowth 45456 mptelpm 46327 choicefi 46350 mullimc 46764 limcmptdm 46781 dvsinax 47059 dirkercncflem2 47250 fourierdlem62 47314 psmeasure 47617 ovnovollem2 47803 smfmbfcex 47906 smflimsuplem2 47967 |
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