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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.c | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ 𝑉) | |
2 | elex 3185 | . . . . 5 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ V) | |
3 | 1, 2 | syl 17 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ V) |
4 | 3 | ralrimiva 2949 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 𝐶 ∈ V) |
5 | rabid2 3096 | . . 3 ⊢ (𝐵 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V} ↔ ∀𝑥 ∈ 𝐵 𝐶 ∈ V) | |
6 | 4, 5 | sylibr 223 | . 2 ⊢ (𝜑 → 𝐵 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V}) |
7 | dmmptd.a | . . 3 ⊢ 𝐴 = (𝑥 ∈ 𝐵 ↦ 𝐶) | |
8 | 7 | dmmpt 5547 | . 2 ⊢ dom 𝐴 = {𝑥 ∈ 𝐵 ∣ 𝐶 ∈ V} |
9 | 6, 8 | syl6reqr 2663 | 1 ⊢ (𝜑 → dom 𝐴 = 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 ∀wral 2896 {crab 2900 Vcvv 3173 ↦ cmpt 4643 dom cdm 5038 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-opab 4644 df-mpt 4645 df-xp 5044 df-rel 5045 df-cnv 5046 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 |
This theorem is referenced by: cantnfp1lem2 8459 lo1eq 14147 rlimeq 14148 rlimcld2 14157 rlimcn2 14169 rlimmptrcl 14186 rlimsqzlem 14227 dprdz 18252 alexsublem 21658 cmetcaulem 22894 minveclem3b 23007 mbfneg 23223 mbfsup 23237 mbfinf 23238 mbflimsup 23239 itg2monolem1 23323 itg2mono 23326 itg2i1fseq2 23329 itg2cnlem1 23334 isibl2 23339 iblcnlem 23361 limccnp2 23462 limcco 23463 dvmptres3 23525 itgsubstlem 23615 iblulm 23965 rlimcnp2 24493 dchrisumlema 24977 htthlem 27158 expgrowth 37556 mptelpm 38352 choicefi 38387 mullimc 38683 limcmptdm 38702 dvsinax 38801 dirkercncflem2 38997 fourierdlem62 39061 psmeasure 39364 ovnovollem2 39547 |
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