Theorem dvdsfac 12605

Description: A positive integer divides any greater factorial. (Contributed by Paul Chapman, 28-Nov-2012.)

Assertion

Ref	Expression
dvdsfac	|- ( ( K e. NN /\ N e. ( ZZ>= ` K ) ) -> K || ( ! ` N ) )

Proof of Theorem dvdsfac

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fveq2 5690	. . . . 5 |- ( x = K -> ( ! ` x ) = ( ! ` K ) )
2	1	breq2d 4137	. . . 4 |- ( x = K -> ( K || ( ! ` x ) <-> K || ( ! ` K ) ) )
3	2	imbi2d 230	. . 3 |- ( x = K -> ( ( K e. NN -> K || ( ! ` x ) ) <-> ( K e. NN -> K || ( ! ` K ) ) ) )
4		fveq2 5690	. . . . 5 |- ( x = y -> ( ! ` x ) = ( ! ` y ) )
5	4	breq2d 4137	. . . 4 |- ( x = y -> ( K || ( ! ` x ) <-> K || ( ! ` y ) ) )
6	5	imbi2d 230	. . 3 |- ( x = y -> ( ( K e. NN -> K || ( ! ` x ) ) <-> ( K e. NN -> K || ( ! ` y ) ) ) )
7		fveq2 5690	. . . . 5 |- ( x = ( y + 1 ) -> ( ! ` x ) = ( ! ` ( y + 1 ) ) )
8	7	breq2d 4137	. . . 4 |- ( x = ( y + 1 ) -> ( K || ( ! ` x ) <-> K || ( ! ` ( y + 1 ) ) ) )
9	8	imbi2d 230	. . 3 |- ( x = ( y + 1 ) -> ( ( K e. NN -> K || ( ! ` x ) ) <-> ( K e. NN -> K || ( ! ` ( y + 1 ) ) ) ) )
10		fveq2 5690	. . . . 5 |- ( x = N -> ( ! ` x ) = ( ! ` N ) )
11	10	breq2d 4137	. . . 4 |- ( x = N -> ( K || ( ! ` x ) <-> K || ( ! ` N ) ) )
12	11	imbi2d 230	. . 3 |- ( x = N -> ( ( K e. NN -> K || ( ! ` x ) ) <-> ( K e. NN -> K || ( ! ` N ) ) ) )
13		nnm1nn0 9583	. . . . . . . 8 |- ( K e. NN -> ( K - 1 ) e. NN0 )
14		faccl 11151	. . . . . . . 8 |- ( ( K - 1 ) e. NN0 -> ( ! ` ( K - 1 ) ) e. NN )
15	13, 14	syl 14	. . . . . . 7 |- ( K e. NN -> ( ! ` ( K - 1 ) ) e. NN )
16	15	nnzd 9746	. . . . . 6 |- ( K e. NN -> ( ! ` ( K - 1 ) ) e. ZZ )
17		nnz 9642	. . . . . 6 |- ( K e. NN -> K e. ZZ )
18		dvdsmul2 12559	. . . . . 6 |- ( ( ( ! ` ( K - 1 ) ) e. ZZ /\ K e. ZZ ) -> K || ( ( ! ` ( K - 1 ) ) x. K ) )
19	16, 17, 18	syl2anc 415	. . . . 5 |- ( K e. NN -> K || ( ( ! ` ( K - 1 ) ) x. K ) )
20		facnn2 11150	. . . . 5 |- ( K e. NN -> ( ! ` K ) = ( ( ! ` ( K - 1 ) ) x. K ) )
21	19, 20	breqtrrd 4153	. . . 4 |- ( K e. NN -> K || ( ! ` K ) )
22	21	a1i 9	. . 3 |- ( K e. ZZ -> ( K e. NN -> K || ( ! ` K ) ) )
23	17	adantl 277	. . . . . . 7 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> K e. ZZ )
24		elnnuz 9938	. . . . . . . . . . . 12 |- ( K e. NN <-> K e. ( ZZ>= ` 1 ) )
25		uztrn 9918	. . . . . . . . . . . 12 |- ( ( y e. ( ZZ>= ` K ) /\ K e. ( ZZ>= ` 1 ) ) -> y e. ( ZZ>= ` 1 ) )
26	24, 25	sylan2b 287	. . . . . . . . . . 11 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> y e. ( ZZ>= ` 1 ) )
27		elnnuz 9938	. . . . . . . . . . 11 |- ( y e. NN <-> y e. ( ZZ>= ` 1 ) )
28	26, 27	sylibr 134	. . . . . . . . . 10 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> y e. NN )
29	28	nnnn0d 9599	. . . . . . . . 9 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> y e. NN0 )
30		faccl 11151	. . . . . . . . 9 |- ( y e. NN0 -> ( ! ` y ) e. NN )
31	29, 30	syl 14	. . . . . . . 8 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( ! ` y ) e. NN )
32	31	nnzd 9746	. . . . . . 7 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( ! ` y ) e. ZZ )
33	28	nnzd 9746	. . . . . . . 8 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> y e. ZZ )
34	33	peano2zd 9750	. . . . . . 7 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( y + 1 ) e. ZZ )
35		dvdsmultr1 12576	. . . . . . 7 |- ( ( K e. ZZ /\ ( ! ` y ) e. ZZ /\ ( y + 1 ) e. ZZ ) -> ( K || ( ! ` y ) -> K || ( ( ! ` y ) x. ( y + 1 ) ) ) )
36	23, 32, 34, 35	syl3anc 1278	. . . . . 6 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( K || ( ! ` y ) -> K || ( ( ! ` y ) x. ( y + 1 ) ) ) )
37		facp1 11146	. . . . . . . 8 |- ( y e. NN0 -> ( ! ` ( y + 1 ) ) = ( ( ! ` y ) x. ( y + 1 ) ) )
38	29, 37	syl 14	. . . . . . 7 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( ! ` ( y + 1 ) ) = ( ( ! ` y ) x. ( y + 1 ) ) )
39	38	breq2d 4137	. . . . . 6 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( K || ( ! ` ( y + 1 ) ) <-> K || ( ( ! ` y ) x. ( y + 1 ) ) ) )
40	36, 39	sylibrd 169	. . . . 5 |- ( ( y e. ( ZZ>= ` K ) /\ K e. NN ) -> ( K || ( ! ` y ) -> K || ( ! ` ( y + 1 ) ) ) )
41	40	ex 115	. . . 4 |- ( y e. ( ZZ>= ` K ) -> ( K e. NN -> ( K || ( ! ` y ) -> K || ( ! ` ( y + 1 ) ) ) ) )
42	41	a2d 26	. . 3 |- ( y e. ( ZZ>= ` K ) -> ( ( K e. NN -> K || ( ! ` y ) ) -> ( K e. NN -> K || ( ! ` ( y + 1 ) ) ) ) )
43	3, 6, 9, 12, 22, 42	uzind4 9967	. 2 |- ( N e. ( ZZ>= ` K ) -> ( K e. NN -> K || ( ! ` N ) ) )
44	43	impcom 125	1 |- ( ( K e. NN /\ N e. ( ZZ>= ` K ) ) -> K || ( ! ` N ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1402   e. wcel 2209   class class class wbr 4125   ` cfv 5372  (class class class)co 6075   1c1 8170   + caddc 8172   x. cmul 8174   - cmin 8487   NNcn 9283   NN0cn0 9542   ZZcz 9623   ZZ>=cuz 9900   !cfa 11141   || cdvds 12532

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-mulrcl 8268  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-ltadd 8285

This theorem depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-n0 9543  df-z 9624  df-uz 9901  df-seqfrec 10863  df-fac 11142  df-dvds 12533

This theorem is referenced by:  prmunb  13119