Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > hash0 | Structured version Visualization version GIF version |
Description: The empty set has size zero. (Contributed by Mario Carneiro, 8-Jul-2014.) |
Ref | Expression |
---|---|
hash0 | ⊢ (♯‘∅) = 0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2821 | . 2 ⊢ ∅ = ∅ | |
2 | 0ex 5211 | . . 3 ⊢ ∅ ∈ V | |
3 | hasheq0 13725 | . . 3 ⊢ (∅ ∈ V → ((♯‘∅) = 0 ↔ ∅ = ∅)) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ ((♯‘∅) = 0 ↔ ∅ = ∅) |
5 | 1, 4 | mpbir 233 | 1 ⊢ (♯‘∅) = 0 |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 = wceq 1537 ∈ wcel 2114 Vcvv 3494 ∅c0 4291 ‘cfv 6355 0cc0 10537 ♯chash 13691 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-card 9368 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-nn 11639 df-n0 11899 df-z 11983 df-uz 12245 df-fz 12894 df-hash 13692 |
This theorem is referenced by: hashrabrsn 13734 hashrabsn01 13735 hashrabsn1 13736 hashge0 13749 elprchashprn2 13758 hash1 13766 hashsn01 13778 hashgt12el 13784 hashgt12el2 13785 hashfzo 13791 hashfzp1 13793 hashxplem 13795 hashmap 13797 hashbc 13812 hashf1lem2 13815 hashf1 13816 hash2pwpr 13835 wrdnfi 13899 lsw0g 13918 ccatlid 13940 ccatrid 13941 rev0 14126 repswsymballbi 14142 fsumconst 15145 incexclem 15191 incexc 15192 fprodconst 15332 sumodd 15739 hashgcdeq 16126 prmreclem4 16255 prmreclem5 16256 0hashbc 16343 ramz2 16360 cshws0 16435 psgnunilem2 18623 psgnunilem4 18625 psgn0fv0 18639 psgnsn 18648 psgnprfval1 18650 efginvrel2 18853 efgredleme 18869 efgcpbllemb 18881 frgpnabllem1 18993 gsumconst 19054 ltbwe 20253 fta1g 24761 fta1 24897 birthdaylem3 25531 ppi1 25741 musum 25768 rpvmasum 26102 umgrislfupgrlem 26907 lfuhgr1v0e 27036 vtxdg0e 27256 vtxdlfgrval 27267 rusgr1vtxlem 27369 wspn0 27703 rusgrnumwwlkl1 27747 rusgr0edg 27752 clwwlknonel 27874 clwwlknon1le1 27880 0ewlk 27893 0wlk 27895 0wlkon 27899 0pth 27904 0clwlk 27909 0crct 27912 0cycl 27913 eupth0 27993 eulerpathpr 28019 wlkl0 28146 f1ocnt 30525 hashxpe 30529 lvecdim0 31005 esumcst 31322 cntmeas 31485 ballotlemfval0 31753 signsvtn0 31840 signstfvneq0 31842 signstfveq0 31847 signsvf0 31850 lpadright 31955 derangsn 32417 subfacp1lem6 32432 poimirlem25 34932 poimirlem26 34933 poimirlem27 34934 poimirlem28 34935 rp-isfinite6 39904 fzisoeu 41587 |
Copyright terms: Public domain | W3C validator |