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Mirrors > Home > MPE Home > Th. List > bcval2 | Structured version Visualization version GIF version |
Description: Value of the binomial coefficient, ๐ choose ๐พ, in its standard domain. (Contributed by NM, 9-Jun-2005.) (Revised by Mario Carneiro, 7-Nov-2013.) |
Ref | Expression |
---|---|
bcval2 | โข (๐พ โ (0...๐) โ (๐C๐พ) = ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elfz3nn0 13595 | . . 3 โข (๐พ โ (0...๐) โ ๐ โ โ0) | |
2 | elfzelz 13501 | . . 3 โข (๐พ โ (0...๐) โ ๐พ โ โค) | |
3 | bcval 14264 | . . 3 โข ((๐ โ โ0 โง ๐พ โ โค) โ (๐C๐พ) = if(๐พ โ (0...๐), ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ))), 0)) | |
4 | 1, 2, 3 | syl2anc 585 | . 2 โข (๐พ โ (0...๐) โ (๐C๐พ) = if(๐พ โ (0...๐), ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ))), 0)) |
5 | iftrue 4535 | . 2 โข (๐พ โ (0...๐) โ if(๐พ โ (0...๐), ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ))), 0) = ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ)))) | |
6 | 4, 5 | eqtrd 2773 | 1 โข (๐พ โ (0...๐) โ (๐C๐พ) = ((!โ๐) / ((!โ(๐ โ ๐พ)) ยท (!โ๐พ)))) |
Colors of variables: wff setvar class |
Syntax hints: โ wi 4 = wceq 1542 โ wcel 2107 ifcif 4529 โcfv 6544 (class class class)co 7409 0cc0 11110 ยท cmul 11115 โ cmin 11444 / cdiv 11871 โ0cn0 12472 โคcz 12558 ...cfz 13484 !cfa 14233 Ccbc 14262 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-n0 12473 df-z 12559 df-uz 12823 df-fz 13485 df-bc 14263 |
This theorem is referenced by: bcrpcl 14268 bccmpl 14269 bcn0 14270 bcn1 14273 bcm1k 14275 bcp1n 14276 bcval5 14278 permnn 14286 4bc2eq6 14289 hashf1 14418 bcfallfac 15988 efaddlem 16036 pcbc 16833 birthdaylem2 26457 chtublem 26714 bcctr 26778 bcmono 26780 prmdvdsbc 32022 lcmineqlem18 40911 2np3bcnp1 40960 mccllem 44313 dvnprodlem2 44663 |
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