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| Mirrors > Home > MPE Home > Th. List > dmmptss | Structured version Visualization version GIF version | ||
| Description: The domain of a mapping is a subset of its base class. (Contributed by Scott Fenton, 17-Jun-2013.) |
| Ref | Expression |
|---|---|
| dmmpt.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Ref | Expression |
|---|---|
| dmmptss | ⊢ dom 𝐹 ⊆ 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmpt.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 2 | 1 | dmmpt 6260 | . 2 ⊢ dom 𝐹 = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V} |
| 3 | 2 | ssrab3 4010 | 1 ⊢ dom 𝐹 ⊆ 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2147 Vcvv 3454 ⊆ wss 3900 ↦ cmpt 5192 dom cdm 5658 |
| 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-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-pr 5398 |
| 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-nf 1817 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 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-sn 4589 df-pr 4591 df-op 4841 df-br 5109 df-opab 5174 df-mpt 5193 df-xp 5664 df-rel 5665 df-cnv 5666 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 |
| This theorem is used by: mptrcl 7034 fvmptss 7037 fvmptex 7039 fvmptnf 7047 elfvmptrab1w 7052 elfvmptrab1 7053 mptexg 7258 mptexw 7999 dmmpossx 8112 tposssxp 8285 mptfi 9378 cnvimamptfin 9380 cantnfres 9715 mptct 10661 arwrcl 18269 submgmrcl 18934 cntzrcl 19592 gsumconst 20199 psrass1lem 22296 psrass1 22326 psrass23l 22329 psrcom 22330 psrass23 22331 mpfrcl 22449 psropprmul 22610 coe1mul2 22643 lmrcl 23604 1stcrestlem 23825 ptbasfi 23955 isxms2 24822 setsmstopn 24852 tngtopn 25024 rrxmval 25781 ulmss 26781 dchrrcl 27624 gsummpt2co 33708 locfinreflem 34583 sitgclg 35085 cvmsrcl 36237 snmlval 36304 gonan0 36365 bj-fvmptunsn1 38446 eldiophb 44034 elmnc 44403 itgocn 44431 tannpoly 48213 dmmpossx2 49780 dmtposss 50320 |
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