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Mirrors > Home > MPE Home > Th. List > xpscf | Structured version Visualization version GIF version |
Description: Equivalent condition for the pair function to be a proper function on 𝐴. (Contributed by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
xpscf | ⊢ (◡({𝑋} +𝑐 {𝑌}):2𝑜⟶𝐴 ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ifid 4125 | . . . . . 6 ⊢ if(𝑘 = ∅, 𝐴, 𝐴) = 𝐴 | |
2 | 1 | eleq2i 2693 | . . . . 5 ⊢ ((◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ if(𝑘 = ∅, 𝐴, 𝐴) ↔ (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ 𝐴) |
3 | 2 | ralbii 2980 | . . . 4 ⊢ (∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ if(𝑘 = ∅, 𝐴, 𝐴) ↔ ∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ 𝐴) |
4 | 3 | anbi2i 730 | . . 3 ⊢ ((◡({𝑋} +𝑐 {𝑌}) Fn 2𝑜 ∧ ∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ if(𝑘 = ∅, 𝐴, 𝐴)) ↔ (◡({𝑋} +𝑐 {𝑌}) Fn 2𝑜 ∧ ∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ 𝐴)) |
5 | ovex 6678 | . . . . 5 ⊢ ({𝑋} +𝑐 {𝑌}) ∈ V | |
6 | 5 | cnvex 7113 | . . . 4 ⊢ ◡({𝑋} +𝑐 {𝑌}) ∈ V |
7 | 6 | elixp 7915 | . . 3 ⊢ (◡({𝑋} +𝑐 {𝑌}) ∈ X𝑘 ∈ 2𝑜 if(𝑘 = ∅, 𝐴, 𝐴) ↔ (◡({𝑋} +𝑐 {𝑌}) Fn 2𝑜 ∧ ∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ if(𝑘 = ∅, 𝐴, 𝐴))) |
8 | ffnfv 6388 | . . 3 ⊢ (◡({𝑋} +𝑐 {𝑌}):2𝑜⟶𝐴 ↔ (◡({𝑋} +𝑐 {𝑌}) Fn 2𝑜 ∧ ∀𝑘 ∈ 2𝑜 (◡({𝑋} +𝑐 {𝑌})‘𝑘) ∈ 𝐴)) | |
9 | 4, 7, 8 | 3bitr4i 292 | . 2 ⊢ (◡({𝑋} +𝑐 {𝑌}) ∈ X𝑘 ∈ 2𝑜 if(𝑘 = ∅, 𝐴, 𝐴) ↔ ◡({𝑋} +𝑐 {𝑌}):2𝑜⟶𝐴) |
10 | xpsfrnel2 16225 | . 2 ⊢ (◡({𝑋} +𝑐 {𝑌}) ∈ X𝑘 ∈ 2𝑜 if(𝑘 = ∅, 𝐴, 𝐴) ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐴)) | |
11 | 9, 10 | bitr3i 266 | 1 ⊢ (◡({𝑋} +𝑐 {𝑌}):2𝑜⟶𝐴 ↔ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ∀wral 2912 ∅c0 3915 ifcif 4086 {csn 4177 ◡ccnv 5113 Fn wfn 5883 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 2𝑜c2o 7554 Xcixp 7908 +𝑐 ccda 8989 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-cda 8990 |
This theorem is referenced by: xpsmnd 17330 xpsgrp 17534 dmdprdpr 18448 dprdpr 18449 xpstopnlem1 21612 xpstps 21613 xpsxms 22339 xpsms 22340 |
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