Theorem numsucc 9613

Description: The successor of a decimal integer (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Hypotheses

Ref	Expression
numsucc.1	|- Y e. NN0
numsucc.2	|- T = ( Y + 1 )
numsucc.3	|- A e. NN0
numsucc.4	|- ( A + 1 ) = B
numsucc.5	|- N = ( ( T x. A ) + Y )

Assertion

Ref	Expression
numsucc	|- ( N + 1 ) = ( ( T x. B ) + 0 )

Proof of Theorem numsucc

Step	Hyp	Ref	Expression
1		numsucc.2	. . . . . . 7 |- T = ( Y + 1 )
2		numsucc.1	. . . . . . . 8 |- Y e. NN0
3		1nn0 9381	. . . . . . . 8 |- 1 e. NN0
4	2, 3	nn0addcli 9402	. . . . . . 7 |- ( Y + 1 ) e. NN0
5	1, 4	eqeltri 2302	. . . . . 6 |- T e. NN0
6	5	nn0cni 9377	. . . . 5 |- T e. CC
7	6	mulridi 8144	. . . 4 |- ( T x. 1 ) = T
8	7	oveq2i 6011	. . 3 |- ( ( T x. A ) + ( T x. 1 ) ) = ( ( T x. A ) + T )
9		numsucc.3	. . . . 5 |- A e. NN0
10	9	nn0cni 9377	. . . 4 |- A e. CC
11		ax-1cn 8088	. . . 4 |- 1 e. CC
12	6, 10, 11	adddii 8152	. . 3 |- ( T x. ( A + 1 ) ) = ( ( T x. A ) + ( T x. 1 ) )
13	1	eqcomi 2233	. . . 4 |- ( Y + 1 ) = T
14		numsucc.5	. . . 4 |- N = ( ( T x. A ) + Y )
15	5, 9, 2, 13, 14	numsuc 9587	. . 3 |- ( N + 1 ) = ( ( T x. A ) + T )
16	8, 12, 15	3eqtr4ri 2261	. 2 |- ( N + 1 ) = ( T x. ( A + 1 ) )
17		numsucc.4	. . 3 |- ( A + 1 ) = B
18	17	oveq2i 6011	. 2 |- ( T x. ( A + 1 ) ) = ( T x. B )
19	9, 3	nn0addcli 9402	. . . 4 |- ( A + 1 ) e. NN0
20	17, 19	eqeltrri 2303	. . 3 |- B e. NN0
21	5, 20	num0u 9584	. 2 |- ( T x. B ) = ( ( T x. B ) + 0 )
22	16, 18, 21	3eqtri 2254	1 |- ( N + 1 ) = ( ( T x. B ) + 0 )

Syntax hints:   = wceq 1395   e. wcel 2200  (class class class)co 6000   0cc0 7995   1c1 7996   + caddc 7998   x. cmul 8000   NN0cn0 9365

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292  ax-setind 4628  ax-cnex 8086  ax-resscn 8087  ax-1cn 8088  ax-1re 8089  ax-icn 8090  ax-addcl 8091  ax-addrcl 8092  ax-mulcl 8093  ax-addcom 8095  ax-mulcom 8096  ax-addass 8097  ax-mulass 8098  ax-distr 8099  ax-i2m1 8100  ax-1rid 8102  ax-0id 8103  ax-rnegex 8104  ax-cnre 8106

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-opab 4145  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-iota 5277  df-fun 5319  df-fv 5325  df-riota 5953  df-ov 6003  df-oprab 6004  df-mpo 6005  df-sub 8315  df-inn 9107  df-n0 9366

This theorem is referenced by:  decsucc  9614