Theorem 3dec 11133

Description: A "decimal constructor" which is used to build up "decimal integers" or "numeric terms" in base 10 with 3 "digits". (Contributed by AV, 14-Jun-2021.) (Revised by AV, 1-Aug-2021.)

Hypotheses

Ref	Expression
3dec.a	|- A e. NN0
3dec.b	|- B e. NN0

Assertion

Ref	Expression
3dec	|- ;; A B C = ( ( ( (; 1 0 ^ 2 ) x. A ) + (; 1 0 x. B ) ) + C )

Proof of Theorem 3dec

Step	Hyp	Ref	Expression
1		dfdec10 9762	. 2 |- ;; A B C = ( (; 1 0 x. ; A B ) + C )
2		dfdec10 9762	. . . . . 6 |- ; A B = ( (; 1 0 x. A ) + B )
3	2	oveq2i 6089	. . . . 5 |- (; 1 0 x. ; A B ) = (; 1 0 x. ( (; 1 0 x. A ) + B ) )
4		1nn 9297	. . . . . . . 8 |- 1 e. NN
5	4	decnncl2 9782	. . . . . . 7 |- ; 1 0 e. NN
6	5	nncni 9296	. . . . . 6 |- ; 1 0 e. CC
7		3dec.a	. . . . . . . 8 |- A e. NN0
8	7	nn0cni 9557	. . . . . . 7 |- A e. CC
9	6, 8	mulcli 8324	. . . . . 6 |- (; 1 0 x. A ) e. CC
10		3dec.b	. . . . . . 7 |- B e. NN0
11	10	nn0cni 9557	. . . . . 6 |- B e. CC
12	6, 9, 11	adddii 8329	. . . . 5 |- (; 1 0 x. ( (; 1 0 x. A ) + B ) ) = ( (; 1 0 x. (; 1 0 x. A ) ) + (; 1 0 x. B ) )
13	3, 12	eqtri 2259	. . . 4 |- (; 1 0 x. ; A B ) = ( (; 1 0 x. (; 1 0 x. A ) ) + (; 1 0 x. B ) )
14	6, 6, 8	mulassi 8328	. . . . . . 7 |- ( (; 1 0 x. ; 1 0 ) x. A ) = (; 1 0 x. (; 1 0 x. A ) )
15	14	eqcomi 2242	. . . . . 6 |- (; 1 0 x. (; 1 0 x. A ) ) = ( (; 1 0 x. ; 1 0 ) x. A )
16	6	sqvali 11037	. . . . . . . 8 |- (; 1 0 ^ 2 ) = (; 1 0 x. ; 1 0 )
17	16	eqcomi 2242	. . . . . . 7 |- (; 1 0 x. ; 1 0 ) = (; 1 0 ^ 2 )
18	17	oveq1i 6088	. . . . . 6 |- ( (; 1 0 x. ; 1 0 ) x. A ) = ( (; 1 0 ^ 2 ) x. A )
19	15, 18	eqtri 2259	. . . . 5 |- (; 1 0 x. (; 1 0 x. A ) ) = ( (; 1 0 ^ 2 ) x. A )
20	19	oveq1i 6088	. . . 4 |- ( (; 1 0 x. (; 1 0 x. A ) ) + (; 1 0 x. B ) ) = ( ( (; 1 0 ^ 2 ) x. A ) + (; 1 0 x. B ) )
21	13, 20	eqtri 2259	. . 3 |- (; 1 0 x. ; A B ) = ( ( (; 1 0 ^ 2 ) x. A ) + (; 1 0 x. B ) )
22	21	oveq1i 6088	. 2 |- ( (; 1 0 x. ; A B ) + C ) = ( ( ( (; 1 0 ^ 2 ) x. A ) + (; 1 0 x. B ) ) + C )
23	1, 22	eqtri 2259	1 |- ;; A B C = ( ( ( (; 1 0 ^ 2 ) x. A ) + (; 1 0 x. B ) ) + C )

Syntax hints:   = wceq 1402   e. wcel 2209  (class class class)co 6078   0cc0 8172   1c1 8173   + caddc 8175   x. cmul 8177   2c2 9337   NN0cn0 9545  ;cdc 9759   ^cexp 10956

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-mulrcl 8271  ax-addcom 8272  ax-mulcom 8273  ax-addass 8274  ax-mulass 8275  ax-distr 8276  ax-i2m1 8277  ax-0lt1 8278  ax-1rid 8279  ax-0id 8280  ax-rnegex 8281  ax-precex 8282  ax-cnre 8283  ax-pre-ltirr 8284  ax-pre-ltwlin 8285  ax-pre-lttrn 8286  ax-pre-apti 8287  ax-pre-ltadd 8288  ax-pre-mulgt0 8289  ax-pre-mulext 8290

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-rmo 2536  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-po 4439  df-iso 4440  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-pnf 8355  df-mnf 8356  df-xr 8357  df-ltxr 8358  df-le 8359  df-sub 8492  df-neg 8493  df-reap 8896  df-ap 8903  df-div 8996  df-inn 9287  df-2 9345  df-3 9346  df-4 9347  df-5 9348  df-6 9349  df-7 9350  df-8 9351  df-9 9352  df-n0 9546  df-z 9627  df-dec 9760  df-uz 9904  df-seqfrec 10866  df-exp 10957

This theorem is referenced by:  3dvds2dec  12614