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Mirrors > Home > MPE Home > Th. List > hashf1dmrn | Structured version Visualization version GIF version |
Description: The size of the domain of a one-to-one set function is equal to the size of its range. (Contributed by BTernaryTau, 1-Oct-2023.) |
Ref | Expression |
---|---|
hashf1dmrn | β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β (β―βπ΄) = (β―βran πΉ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1fun 6783 | . . 3 β’ (πΉ:π΄β1-1βπ΅ β Fun πΉ) | |
2 | hashfundm 14407 | . . 3 β’ ((πΉ β π β§ Fun πΉ) β (β―βπΉ) = (β―βdom πΉ)) | |
3 | 1, 2 | sylan2 592 | . 2 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β (β―βπΉ) = (β―βdom πΉ)) |
4 | f1dm 6785 | . . . . 5 β’ (πΉ:π΄β1-1βπ΅ β dom πΉ = π΄) | |
5 | 4 | adantl 481 | . . . 4 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β dom πΉ = π΄) |
6 | dmexg 7891 | . . . . 5 β’ (πΉ β π β dom πΉ β V) | |
7 | 6 | adantr 480 | . . . 4 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β dom πΉ β V) |
8 | 5, 7 | eqeltrrd 2828 | . . 3 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β π΄ β V) |
9 | hashf1rn 14317 | . . 3 β’ ((π΄ β V β§ πΉ:π΄β1-1βπ΅) β (β―βπΉ) = (β―βran πΉ)) | |
10 | 8, 9 | sylancom 587 | . 2 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β (β―βπΉ) = (β―βran πΉ)) |
11 | 5 | fveq2d 6889 | . 2 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β (β―βdom πΉ) = (β―βπ΄)) |
12 | 3, 10, 11 | 3eqtr3rd 2775 | 1 β’ ((πΉ β π β§ πΉ:π΄β1-1βπ΅) β (β―βπ΄) = (β―βran πΉ)) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ wa 395 = wceq 1533 β wcel 2098 Vcvv 3468 dom cdm 5669 ran crn 5670 Fun wfun 6531 β1-1βwf1 6534 βcfv 6537 β―chash 14295 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-oadd 8471 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-n0 12477 df-xnn0 12549 df-z 12563 df-uz 12827 df-fz 13491 df-hash 14296 |
This theorem is referenced by: hashf1dmcdm 14409 lmimdim 33206 |
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