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Mirrors > Home > MPE Home > Th. List > f1osn | Structured version Visualization version Unicode version |
Description: A singleton of an ordered pair is one-to-one onto function. (Contributed by NM, 18-May-1998.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
Ref | Expression |
---|---|
f1osn.1 | |
f1osn.2 |
Ref | Expression |
---|---|
f1osn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1osn.1 | . . 3 | |
2 | f1osn.2 | . . 3 | |
3 | 1, 2 | fnsn 5946 | . 2 |
4 | 2, 1 | fnsn 5946 | . . 3 |
5 | 1, 2 | cnvsn 5618 | . . . 4 |
6 | 5 | fneq1i 5985 | . . 3 |
7 | 4, 6 | mpbir 221 | . 2 |
8 | dff1o4 6145 | . 2 | |
9 | 3, 7, 8 | mpbir2an 955 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wcel 1990 cvv 3200 csn 4177 cop 4183 ccnv 5113 wfn 5883 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-ral 2917 df-rex 2918 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-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: f1osng 6177 fsn 6402 mapsn 7899 ensn1 8020 phplem2 8140 isinf 8173 pssnn 8178 ac6sfi 8204 marypha1lem 8339 hashf1lem1 13239 0ram 15724 mdet0f1o 20399 imasdsf1olem 22178 istrkg2ld 25359 axlowdimlem10 25831 subfacp1lem5 31166 poimirlem3 33412 grposnOLD 33681 |
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