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Mirrors > Home > MPE Home > Th. List > f1o2sn | Structured version Visualization version Unicode version |
Description: A singleton with a nested ordered pair is a one-to-one function of the cartesian product of two singleton onto a singleton. (Contributed by AV, 15-Aug-2019.) |
Ref | Expression |
---|---|
f1o2sn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opex 4932 | . . 3 | |
2 | simpr 477 | . . 3 | |
3 | f1osng 6177 | . . 3 | |
4 | 1, 2, 3 | sylancr 695 | . 2 |
5 | xpsng 6406 | . . . . . 6 | |
6 | 5 | anidms 677 | . . . . 5 |
7 | 6 | eqcomd 2628 | . . . 4 |
8 | 7 | adantr 481 | . . 3 |
9 | f1oeq2 6128 | . . 3 | |
10 | 8, 9 | syl 17 | . 2 |
11 | 4, 10 | mpbid 222 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wceq 1483 wcel 1990 cvv 3200 csn 4177 cop 4183 cxp 5112 wf1o 5887 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 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-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 |
This theorem is referenced by: mat1dimelbas 20277 |
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