Theorem ennnfonelemfun 13289

Description: Lemma for ennnfone 13297. L is a function. (Contributed by Jim Kingdon, 16-Jul-2023.)

Hypotheses

Ref	Expression
ennnfonelemh.dceq	|- ( ph -> A. x e. A A. y e. A DECID x = y )
ennnfonelemh.f	|- ( ph -> F : om -onto-> A )
ennnfonelemh.ne	|- ( ph -> A. n e. om E. k e. om A. j e. suc n ( F ` k ) =/= ( F ` j ) )
ennnfonelemh.g	|- G = ( x e. ( A ^pm om ) , y e. om |-> if ( ( F ` y ) e. ( F " y ) , x , ( x u. { <. dom x , ( F ` y ) >. } ) ) )
ennnfonelemh.n	|- N = frec ( ( x e. ZZ |-> ( x + 1 ) ) , 0 )
ennnfonelemh.j	|- J = ( x e. NN0 |-> if ( x = 0 , (/) , ( `' N ` ( x - 1 ) ) ) )
ennnfonelemh.h	|- H = seq 0 ( G , J )
ennnfone.l	|- L = U_ i e. NN0 ( H ` i )

Assertion

Ref	Expression
ennnfonelemfun	|- ( ph -> Fun L )

Distinct variable groups:   A, j, x, y   x, F, y, j   k, F, n, j   j, G   i, H   j, H, x, y   j, J   x, N, y   ph, j, x, y

Allowed substitution hints:   ph( i, k, n)   A( i, k, n)   F( i)   G( x, y, i, k, n)   H( k, n)   J( x, y, i, k, n)   L( x, y, i, j, k, n)   N( i, j, k, n)

Proof of Theorem ennnfonelemfun

Dummy variables s t are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ennnfonelemh.dceq	. . . . . . . . 9 |- ( ph -> A. x e. A A. y e. A DECID x = y )
2		ennnfonelemh.f	. . . . . . . . 9 |- ( ph -> F : om -onto-> A )
3		ennnfonelemh.ne	. . . . . . . . 9 |- ( ph -> A. n e. om E. k e. om A. j e. suc n ( F ` k ) =/= ( F ` j ) )
4		ennnfonelemh.g	. . . . . . . . 9 |- G = ( x e. ( A ^pm om ) , y e. om |-> if ( ( F ` y ) e. ( F " y ) , x , ( x u. { <. dom x , ( F ` y ) >. } ) ) )
5		ennnfonelemh.n	. . . . . . . . 9 |- N = frec ( ( x e. ZZ |-> ( x + 1 ) ) , 0 )
6		ennnfonelemh.j	. . . . . . . . 9 |- J = ( x e. NN0 |-> if ( x = 0 , (/) , ( `' N ` ( x - 1 ) ) ) )
7		ennnfonelemh.h	. . . . . . . . 9 |- H = seq 0 ( G , J )
8	1, 2, 3, 4, 5, 6, 7	ennnfonelemh 13276	. . . . . . . 8 |- ( ph -> H : NN0 --> ( A ^pm om ) )
9	8	frnd 5541	. . . . . . 7 |- ( ph -> ran H C_ ( A ^pm om ) )
10	9	sselda 3248	. . . . . 6 |- ( ( ph /\ s e. ran H ) -> s e. ( A ^pm om ) )
11		pmfun 6935	. . . . . 6 |- ( s e. ( A ^pm om ) -> Fun s )
12	10, 11	syl 14	. . . . 5 |- ( ( ph /\ s e. ran H ) -> Fun s )
13	1	ad2antrr 492	. . . . . . 7 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> A. x e. A A. y e. A DECID x = y )
14	2	ad2antrr 492	. . . . . . 7 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> F : om -onto-> A )
15	3	ad2antrr 492	. . . . . . 7 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> A. n e. om E. k e. om A. j e. suc n ( F ` k ) =/= ( F ` j ) )
16		simplr 533	. . . . . . 7 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> s e. ran H )
17		simpr 110	. . . . . . 7 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> t e. ran H )
18	13, 14, 15, 4, 5, 6, 7, 16, 17	ennnfonelemrnh 13288	. . . . . 6 |- ( ( ( ph /\ s e. ran H ) /\ t e. ran H ) -> ( s C_ t \/ t C_ s ) )
19	18	ralrimiva 2623	. . . . 5 |- ( ( ph /\ s e. ran H ) -> A. t e. ran H ( s C_ t \/ t C_ s ) )
20	12, 19	jca 306	. . . 4 |- ( ( ph /\ s e. ran H ) -> ( Fun s /\ A. t e. ran H ( s C_ t \/ t C_ s ) ) )
21	20	ralrimiva 2623	. . 3 |- ( ph -> A. s e. ran H ( Fun s /\ A. t e. ran H ( s C_ t \/ t C_ s ) ) )
22		fununi 5447	. . 3 |- ( A. s e. ran H ( Fun s /\ A. t e. ran H ( s C_ t \/ t C_ s ) ) -> Fun U. ran H )
23	21, 22	syl 14	. 2 |- ( ph -> Fun U. ran H )
24		ennnfone.l	. . . 4 |- L = U_ i e. NN0 ( H ` i )
25	8	ffnd 5532	. . . . 5 |- ( ph -> H Fn NN0 )
26		fniunfv 5961	. . . . 5 |- ( H Fn NN0 -> U_ i e. NN0 ( H ` i ) = U. ran H )
27	25, 26	syl 14	. . . 4 |- ( ph -> U_ i e. NN0 ( H ` i ) = U. ran H )
28	24, 27	eqtrid 2283	. . 3 |- ( ph -> L = U. ran H )
29	28	funeqd 5397	. 2 |- ( ph -> ( Fun L <-> Fun U. ran H ) )
30	23, 29	mpbird 167	1 |- ( ph -> Fun L )

Syntax hints:   -> wi 4   /\ wa 104   \/ wo 720  DECID wdc 846   = wceq 1402   e. wcel 2209   =/= wne 2420   A.wral 2528   E.wrex 2529   u. cun 3218   C_ wss 3220   (/)c0 3520   ifcif 3638   {csn 3708   <.cop 3711   U.cuni 3933   U_ciun 4010   |-> cmpt 4190   suc csuc 4508   omcom 4735   `'ccnv 4771   dom cdm 4772   ran crn 4773   "cima 4775   Fun wfun 5369   Fn wfn 5370   -onto->wfo 5373   ` cfv 5375  (class class class)co 6078   e. cmpo 6080  freccfrec 6654   ^pm cpm 6916   0cc0 8172   1c1 8173   + caddc 8175   - cmin 8490   NN0cn0 9545   ZZcz 9626   seqcseq 10865

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 4244  ax-sep 4247  ax-nul 4257  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-iinf 4733  ax-cnex 8263  ax-resscn 8264  ax-1cn 8265  ax-1re 8266  ax-icn 8267  ax-addcl 8268  ax-addrcl 8269  ax-mulcl 8270  ax-addcom 8272  ax-addass 8274  ax-distr 8276  ax-i2m1 8277  ax-0lt1 8278  ax-0id 8280  ax-rnegex 8281  ax-cnre 8283  ax-pre-ltirr 8284  ax-pre-ltwlin 8285  ax-pre-lttrn 8286  ax-pre-ltadd 8288

This theorem depends on definitions:  df-bi 117  df-dc 847  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-if 3639  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-iun 4012  df-br 4129  df-opab 4191  df-mpt 4192  df-tr 4228  df-id 4436  df-iord 4509  df-on 4511  df-ilim 4512  df-suc 4514  df-iom 4736  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-riota 6031  df-ov 6081  df-oprab 6082  df-mpo 6083  df-1st 6367  df-2nd 6368  df-recs 6569  df-frec 6655  df-pm 6918  df-pnf 8355  df-mnf 8356  df-xr 8357  df-ltxr 8358  df-le 8359  df-sub 8492  df-neg 8493  df-inn 9287  df-n0 9546  df-z 9627  df-uz 9904  df-seqfrec 10866

This theorem is referenced by:  ennnfonelemf1  13290