Theorem uzn0 9611

Description: The upper integers are all nonempty. (Contributed by Mario Carneiro, 16-Jan-2014.)

Assertion

Ref	Expression
uzn0	|- ( M e. ran ZZ>= -> M =/= (/) )

Proof of Theorem uzn0

Dummy variable k is distinct from all other variables.

Step	Hyp	Ref	Expression
1		uzf 9598	. . 3 |- ZZ>= : ZZ --> ~P ZZ
2		ffn 5404	. . 3 |- ( ZZ>= : ZZ --> ~P ZZ -> ZZ>= Fn ZZ )
3		fvelrnb 5605	. . 3 |- ( ZZ>= Fn ZZ -> ( M e. ran ZZ>= <-> E. k e. ZZ ( ZZ>= ` k ) = M ) )
4	1, 2, 3	mp2b 8	. 2 |- ( M e. ran ZZ>= <-> E. k e. ZZ ( ZZ>= ` k ) = M )
5		uzid 9609	. . . . 5 |- ( k e. ZZ -> k e. ( ZZ>= ` k ) )
6		ne0i 3454	. . . . 5 |- ( k e. ( ZZ>= ` k ) -> ( ZZ>= ` k ) =/= (/) )
7	5, 6	syl 14	. . . 4 |- ( k e. ZZ -> ( ZZ>= ` k ) =/= (/) )
8		neeq1 2377	. . . 4 |- ( ( ZZ>= ` k ) = M -> ( ( ZZ>= ` k ) =/= (/) <-> M =/= (/) ) )
9	7, 8	syl5ibcom 155	. . 3 |- ( k e. ZZ -> ( ( ZZ>= ` k ) = M -> M =/= (/) ) )
10	9	rexlimiv 2605	. 2 |- ( E. k e. ZZ ( ZZ>= ` k ) = M -> M =/= (/) )
11	4, 10	sylbi 121	1 |- ( M e. ran ZZ>= -> M =/= (/) )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1364   e. wcel 2164   =/= wne 2364   E.wrex 2473   (/)c0 3447   ~Pcpw 3602   ran crn 4661   Fn wfn 5250   -->wf 5251   ` cfv 5255   ZZcz 9320   ZZ>=cuz 9595

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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4148  ax-pow 4204  ax-pr 4239  ax-un 4465  ax-setind 4570  ax-cnex 7965  ax-resscn 7966  ax-pre-ltirr 7986

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-rab 2481  df-v 2762  df-sbc 2987  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-nul 3448  df-pw 3604  df-sn 3625  df-pr 3626  df-op 3628  df-uni 3837  df-br 4031  df-opab 4092  df-mpt 4093  df-id 4325  df-xp 4666  df-rel 4667  df-cnv 4668  df-co 4669  df-dm 4670  df-rn 4671  df-res 4672  df-ima 4673  df-iota 5216  df-fun 5257  df-fn 5258  df-f 5259  df-fv 5263  df-ov 5922  df-pnf 8058  df-mnf 8059  df-xr 8060  df-ltxr 8061  df-le 8062  df-neg 8195  df-z 9321  df-uz 9596

This theorem is referenced by: (None)