Theorem bitsinv1 15164

Description: There is an explicit inverse to the bits function for nonnegative integers (which can be extended to negative integers using bitscmp 15160), part 1. (Contributed by Mario Carneiro, 7-Sep-2016.)

Assertion

Ref	Expression
bitsinv1	|- ( N e. NN0 -> sum_ n e. (bits ` N ) ( 2 ^ n ) = N )

Distinct variable group:   n, N

Proof of Theorem bitsinv1

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

Step	Hyp	Ref	Expression
1		oveq2 6658	. . . . . . . . . . 11 |- ( x = 0 -> ( 0..^ x ) = ( 0..^ 0 ) )
2		fzo0 12492	. . . . . . . . . . 11 |- ( 0..^ 0 ) = (/)
3	1, 2	syl6eq 2672	. . . . . . . . . 10 |- ( x = 0 -> ( 0..^ x ) = (/) )
4	3	ineq2d 3814	. . . . . . . . 9 |- ( x = 0 -> ( (bits ` N ) i^i ( 0..^ x ) ) = ( (bits ` N ) i^i (/) ) )
5		in0 3968	. . . . . . . . 9 |- ( (bits ` N ) i^i (/) ) = (/)
6	4, 5	syl6eq 2672	. . . . . . . 8 |- ( x = 0 -> ( (bits ` N ) i^i ( 0..^ x ) ) = (/) )
7	6	sumeq1d 14431	. . . . . . 7 |- ( x = 0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = sum_ n e. (/) ( 2 ^ n ) )
8		sum0 14452	. . . . . . 7 |- sum_ n e. (/) ( 2 ^ n ) = 0
9	7, 8	syl6eq 2672	. . . . . 6 |- ( x = 0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = 0 )
10		oveq2 6658	. . . . . . . 8 |- ( x = 0 -> ( 2 ^ x ) = ( 2 ^ 0 ) )
11		2cn 11091	. . . . . . . . 9 |- 2 e. CC
12		exp0 12864	. . . . . . . . 9 |- ( 2 e. CC -> ( 2 ^ 0 ) = 1 )
13	11, 12	ax-mp 5	. . . . . . . 8 |- ( 2 ^ 0 ) = 1
14	10, 13	syl6eq 2672	. . . . . . 7 |- ( x = 0 -> ( 2 ^ x ) = 1 )
15	14	oveq2d 6666	. . . . . 6 |- ( x = 0 -> ( N mod ( 2 ^ x ) ) = ( N mod 1 ) )
16	9, 15	eqeq12d 2637	. . . . 5 |- ( x = 0 -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) <-> 0 = ( N mod 1 ) ) )
17	16	imbi2d 330	. . . 4 |- ( x = 0 -> ( ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) ) <-> ( N e. NN0 -> 0 = ( N mod 1 ) ) ) )
18		oveq2 6658	. . . . . . . 8 |- ( x = k -> ( 0..^ x ) = ( 0..^ k ) )
19	18	ineq2d 3814	. . . . . . 7 |- ( x = k -> ( (bits ` N ) i^i ( 0..^ x ) ) = ( (bits ` N ) i^i ( 0..^ k ) ) )
20	19	sumeq1d 14431	. . . . . 6 |- ( x = k -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) )
21		oveq2 6658	. . . . . . 7 |- ( x = k -> ( 2 ^ x ) = ( 2 ^ k ) )
22	21	oveq2d 6666	. . . . . 6 |- ( x = k -> ( N mod ( 2 ^ x ) ) = ( N mod ( 2 ^ k ) ) )
23	20, 22	eqeq12d 2637	. . . . 5 |- ( x = k -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) <-> sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) ) )
24	23	imbi2d 330	. . . 4 |- ( x = k -> ( ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) ) <-> ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) ) ) )
25		oveq2 6658	. . . . . . . 8 |- ( x = ( k + 1 ) -> ( 0..^ x ) = ( 0..^ ( k + 1 ) ) )
26	25	ineq2d 3814	. . . . . . 7 |- ( x = ( k + 1 ) -> ( (bits ` N ) i^i ( 0..^ x ) ) = ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) )
27	26	sumeq1d 14431	. . . . . 6 |- ( x = ( k + 1 ) -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) )
28		oveq2 6658	. . . . . . 7 |- ( x = ( k + 1 ) -> ( 2 ^ x ) = ( 2 ^ ( k + 1 ) ) )
29	28	oveq2d 6666	. . . . . 6 |- ( x = ( k + 1 ) -> ( N mod ( 2 ^ x ) ) = ( N mod ( 2 ^ ( k + 1 ) ) ) )
30	27, 29	eqeq12d 2637	. . . . 5 |- ( x = ( k + 1 ) -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) <-> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) ) )
31	30	imbi2d 330	. . . 4 |- ( x = ( k + 1 ) -> ( ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) ) <-> ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) ) ) )
32		oveq2 6658	. . . . . . . 8 |- ( x = N -> ( 0..^ x ) = ( 0..^ N ) )
33	32	ineq2d 3814	. . . . . . 7 |- ( x = N -> ( (bits ` N ) i^i ( 0..^ x ) ) = ( (bits ` N ) i^i ( 0..^ N ) ) )
34	33	sumeq1d 14431	. . . . . 6 |- ( x = N -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) )
35		oveq2 6658	. . . . . . 7 |- ( x = N -> ( 2 ^ x ) = ( 2 ^ N ) )
36	35	oveq2d 6666	. . . . . 6 |- ( x = N -> ( N mod ( 2 ^ x ) ) = ( N mod ( 2 ^ N ) ) )
37	34, 36	eqeq12d 2637	. . . . 5 |- ( x = N -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) <-> sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) = ( N mod ( 2 ^ N ) ) ) )
38	37	imbi2d 330	. . . 4 |- ( x = N -> ( ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ x ) ) ( 2 ^ n ) = ( N mod ( 2 ^ x ) ) ) <-> ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) = ( N mod ( 2 ^ N ) ) ) ) )
39		nn0z 11400	. . . . . 6 |- ( N e. NN0 -> N e. ZZ )
40		zmod10 12686	. . . . . 6 |- ( N e. ZZ -> ( N mod 1 ) = 0 )
41	39, 40	syl 17	. . . . 5 |- ( N e. NN0 -> ( N mod 1 ) = 0 )
42	41	eqcomd 2628	. . . 4 |- ( N e. NN0 -> 0 = ( N mod 1 ) )
43		oveq1 6657	. . . . . . 7 |- ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) = ( ( N mod ( 2 ^ k ) ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) )
44		fzonel 12483	. . . . . . . . . . . . 13 |- -. k e. ( 0..^ k )
45	44	a1i 11	. . . . . . . . . . . 12 |- ( ( N e. NN0 /\ k e. NN0 ) -> -. k e. ( 0..^ k ) )
46		disjsn 4246	. . . . . . . . . . . 12 |- ( ( ( 0..^ k ) i^i { k } ) = (/) <-> -. k e. ( 0..^ k ) )
47	45, 46	sylibr 224	. . . . . . . . . . 11 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( ( 0..^ k ) i^i { k } ) = (/) )
48	47	ineq2d 3814	. . . . . . . . . 10 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( (bits ` N ) i^i ( ( 0..^ k ) i^i { k } ) ) = ( (bits ` N ) i^i (/) ) )
49		inindi 3830	. . . . . . . . . 10 |- ( (bits ` N ) i^i ( ( 0..^ k ) i^i { k } ) ) = ( ( (bits ` N ) i^i ( 0..^ k ) ) i^i ( (bits ` N ) i^i { k } ) )
50	48, 49, 5	3eqtr3g 2679	. . . . . . . . 9 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( ( (bits ` N ) i^i ( 0..^ k ) ) i^i ( (bits ` N ) i^i { k } ) ) = (/) )
51		simpr 477	. . . . . . . . . . . . 13 |- ( ( N e. NN0 /\ k e. NN0 ) -> k e. NN0 )
52		nn0uz 11722	. . . . . . . . . . . . 13 |- NN0 = ( ZZ>= ` 0 )
53	51, 52	syl6eleq 2711	. . . . . . . . . . . 12 |- ( ( N e. NN0 /\ k e. NN0 ) -> k e. ( ZZ>= ` 0 ) )
54		fzosplitsn 12576	. . . . . . . . . . . 12 |- ( k e. ( ZZ>= ` 0 ) -> ( 0..^ ( k + 1 ) ) = ( ( 0..^ k ) u. { k } ) )
55	53, 54	syl 17	. . . . . . . . . . 11 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( 0..^ ( k + 1 ) ) = ( ( 0..^ k ) u. { k } ) )
56	55	ineq2d 3814	. . . . . . . . . 10 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) = ( (bits ` N ) i^i ( ( 0..^ k ) u. { k } ) ) )
57		indi 3873	. . . . . . . . . 10 |- ( (bits ` N ) i^i ( ( 0..^ k ) u. { k } ) ) = ( ( (bits ` N ) i^i ( 0..^ k ) ) u. ( (bits ` N ) i^i { k } ) )
58	56, 57	syl6eq 2672	. . . . . . . . 9 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) = ( ( (bits ` N ) i^i ( 0..^ k ) ) u. ( (bits ` N ) i^i { k } ) ) )
59		fzofi 12773	. . . . . . . . . . 11 |- ( 0..^ ( k + 1 ) ) e. Fin
60		inss2 3834	. . . . . . . . . . 11 |- ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) C_ ( 0..^ ( k + 1 ) )
61		ssfi 8180	. . . . . . . . . . 11 |- ( ( ( 0..^ ( k + 1 ) ) e. Fin /\ ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) C_ ( 0..^ ( k + 1 ) ) ) -> ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) e. Fin )
62	59, 60, 61	mp2an 708	. . . . . . . . . 10 |- ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) e. Fin
63	62	a1i 11	. . . . . . . . 9 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) e. Fin )
64		2nn 11185	. . . . . . . . . . . 12 |- 2 e. NN
65	64	a1i 11	. . . . . . . . . . 11 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> 2 e. NN )
66		simpr 477	. . . . . . . . . . . . . 14 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) )
67	66	elin2d 3803	. . . . . . . . . . . . 13 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> n e. ( 0..^ ( k + 1 ) ) )
68		elfzouz 12474	. . . . . . . . . . . . 13 |- ( n e. ( 0..^ ( k + 1 ) ) -> n e. ( ZZ>= ` 0 ) )
69	67, 68	syl 17	. . . . . . . . . . . 12 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> n e. ( ZZ>= ` 0 ) )
70	69, 52	syl6eleqr 2712	. . . . . . . . . . 11 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> n e. NN0 )
71	65, 70	nnexpcld 13030	. . . . . . . . . 10 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> ( 2 ^ n ) e. NN )
72	71	nncnd 11036	. . . . . . . . 9 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ) -> ( 2 ^ n ) e. CC )
73	50, 58, 63, 72	fsumsplit 14471	. . . . . . . 8 |- ( ( N e. NN0 /\ k e. NN0 ) -> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) )
74		bitsinv1lem 15163	. . . . . . . . . 10 |- ( ( N e. ZZ /\ k e. NN0 ) -> ( N mod ( 2 ^ ( k + 1 ) ) ) = ( ( N mod ( 2 ^ k ) ) + if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) ) )
75	39, 74	sylan 488	. . . . . . . . 9 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( N mod ( 2 ^ ( k + 1 ) ) ) = ( ( N mod ( 2 ^ k ) ) + if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) ) )
76		eqeq2 2633	. . . . . . . . . . 11 |- ( ( 2 ^ k ) = if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) -> ( sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = ( 2 ^ k ) <-> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) ) )
77		eqeq2 2633	. . . . . . . . . . 11 |- ( 0 = if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) -> ( sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = 0 <-> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) ) )
78		simpr 477	. . . . . . . . . . . . . . 15 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> k e. (bits ` N ) )
79	78	snssd 4340	. . . . . . . . . . . . . 14 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> { k } C_ (bits ` N ) )
80		sseqin2 3817	. . . . . . . . . . . . . 14 |- ( { k } C_ (bits ` N ) <-> ( (bits ` N ) i^i { k } ) = { k } )
81	79, 80	sylib 208	. . . . . . . . . . . . 13 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> ( (bits ` N ) i^i { k } ) = { k } )
82	81	sumeq1d 14431	. . . . . . . . . . . 12 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = sum_ n e. { k } ( 2 ^ n ) )
83		simplr 792	. . . . . . . . . . . . 13 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> k e. NN0 )
84	64	a1i 11	. . . . . . . . . . . . . . 15 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> 2 e. NN )
85	84, 83	nnexpcld 13030	. . . . . . . . . . . . . 14 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> ( 2 ^ k ) e. NN )
86	85	nncnd 11036	. . . . . . . . . . . . 13 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> ( 2 ^ k ) e. CC )
87		oveq2 6658	. . . . . . . . . . . . . 14 |- ( n = k -> ( 2 ^ n ) = ( 2 ^ k ) )
88	87	sumsn 14475	. . . . . . . . . . . . 13 |- ( ( k e. NN0 /\ ( 2 ^ k ) e. CC ) -> sum_ n e. { k } ( 2 ^ n ) = ( 2 ^ k ) )
89	83, 86, 88	syl2anc 693	. . . . . . . . . . . 12 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> sum_ n e. { k } ( 2 ^ n ) = ( 2 ^ k ) )
90	82, 89	eqtrd 2656	. . . . . . . . . . 11 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ k e. (bits ` N ) ) -> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = ( 2 ^ k ) )
91		simpr 477	. . . . . . . . . . . . . 14 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ -. k e. (bits ` N ) ) -> -. k e. (bits ` N ) )
92		disjsn 4246	. . . . . . . . . . . . . 14 |- ( ( (bits ` N ) i^i { k } ) = (/) <-> -. k e. (bits ` N ) )
93	91, 92	sylibr 224	. . . . . . . . . . . . 13 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ -. k e. (bits ` N ) ) -> ( (bits ` N ) i^i { k } ) = (/) )
94	93	sumeq1d 14431	. . . . . . . . . . . 12 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ -. k e. (bits ` N ) ) -> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = sum_ n e. (/) ( 2 ^ n ) )
95	94, 8	syl6eq 2672	. . . . . . . . . . 11 |- ( ( ( N e. NN0 /\ k e. NN0 ) /\ -. k e. (bits ` N ) ) -> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = 0 )
96	76, 77, 90, 95	ifbothda 4123	. . . . . . . . . 10 |- ( ( N e. NN0 /\ k e. NN0 ) -> sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) = if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) )
97	96	oveq2d 6666	. . . . . . . . 9 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( ( N mod ( 2 ^ k ) ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) = ( ( N mod ( 2 ^ k ) ) + if ( k e. (bits ` N ) , ( 2 ^ k ) , 0 ) ) )
98	75, 97	eqtr4d 2659	. . . . . . . 8 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( N mod ( 2 ^ ( k + 1 ) ) ) = ( ( N mod ( 2 ^ k ) ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) )
99	73, 98	eqeq12d 2637	. . . . . . 7 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) <-> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) = ( ( N mod ( 2 ^ k ) ) + sum_ n e. ( (bits ` N ) i^i { k } ) ( 2 ^ n ) ) ) )
100	43, 99	syl5ibr 236	. . . . . 6 |- ( ( N e. NN0 /\ k e. NN0 ) -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) -> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) ) )
101	100	expcom 451	. . . . 5 |- ( k e. NN0 -> ( N e. NN0 -> ( sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) -> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) ) ) )
102	101	a2d 29	. . . 4 |- ( k e. NN0 -> ( ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ k ) ) ( 2 ^ n ) = ( N mod ( 2 ^ k ) ) ) -> ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ ( k + 1 ) ) ) ( 2 ^ n ) = ( N mod ( 2 ^ ( k + 1 ) ) ) ) ) )
103	17, 24, 31, 38, 42, 102	nn0ind 11472	. . 3 |- ( N e. NN0 -> ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) = ( N mod ( 2 ^ N ) ) ) )
104	103	pm2.43i 52	. 2 |- ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) = ( N mod ( 2 ^ N ) ) )
105		id 22	. . . . . . 7 |- ( N e. NN0 -> N e. NN0 )
106	105, 52	syl6eleq 2711	. . . . . 6 |- ( N e. NN0 -> N e. ( ZZ>= ` 0 ) )
107	64	a1i 11	. . . . . . . 8 |- ( N e. NN0 -> 2 e. NN )
108	107, 105	nnexpcld 13030	. . . . . . 7 |- ( N e. NN0 -> ( 2 ^ N ) e. NN )
109	108	nnzd 11481	. . . . . 6 |- ( N e. NN0 -> ( 2 ^ N ) e. ZZ )
110		2z 11409	. . . . . . . 8 |- 2 e. ZZ
111		uzid 11702	. . . . . . . 8 |- ( 2 e. ZZ -> 2 e. ( ZZ>= ` 2 ) )
112	110, 111	ax-mp 5	. . . . . . 7 |- 2 e. ( ZZ>= ` 2 )
113		bernneq3 12992	. . . . . . 7 |- ( ( 2 e. ( ZZ>= ` 2 ) /\ N e. NN0 ) -> N < ( 2 ^ N ) )
114	112, 113	mpan 706	. . . . . 6 |- ( N e. NN0 -> N < ( 2 ^ N ) )
115		elfzo2 12473	. . . . . 6 |- ( N e. ( 0..^ ( 2 ^ N ) ) <-> ( N e. ( ZZ>= ` 0 ) /\ ( 2 ^ N ) e. ZZ /\ N < ( 2 ^ N ) ) )
116	106, 109, 114, 115	syl3anbrc 1246	. . . . 5 |- ( N e. NN0 -> N e. ( 0..^ ( 2 ^ N ) ) )
117		bitsfzo 15157	. . . . . 6 |- ( ( N e. ZZ /\ N e. NN0 ) -> ( N e. ( 0..^ ( 2 ^ N ) ) <-> (bits ` N ) C_ ( 0..^ N ) ) )
118	39, 105, 117	syl2anc 693	. . . . 5 |- ( N e. NN0 -> ( N e. ( 0..^ ( 2 ^ N ) ) <-> (bits ` N ) C_ ( 0..^ N ) ) )
119	116, 118	mpbid 222	. . . 4 |- ( N e. NN0 -> (bits ` N ) C_ ( 0..^ N ) )
120		df-ss 3588	. . . 4 |- ( (bits ` N ) C_ ( 0..^ N ) <-> ( (bits ` N ) i^i ( 0..^ N ) ) = (bits ` N ) )
121	119, 120	sylib 208	. . 3 |- ( N e. NN0 -> ( (bits ` N ) i^i ( 0..^ N ) ) = (bits ` N ) )
122	121	sumeq1d 14431	. 2 |- ( N e. NN0 -> sum_ n e. ( (bits ` N ) i^i ( 0..^ N ) ) ( 2 ^ n ) = sum_ n e. (bits ` N ) ( 2 ^ n ) )
123		nn0re 11301	. . 3 |- ( N e. NN0 -> N e. RR )
124		2rp 11837	. . . . 5 |- 2 e. RR+
125	124	a1i 11	. . . 4 |- ( N e. NN0 -> 2 e. RR+ )
126	125, 39	rpexpcld 13032	. . 3 |- ( N e. NN0 -> ( 2 ^ N ) e. RR+ )
127		nn0ge0 11318	. . 3 |- ( N e. NN0 -> 0 <_ N )
128		modid 12695	. . 3 |- ( ( ( N e. RR /\ ( 2 ^ N ) e. RR+ ) /\ ( 0 <_ N /\ N < ( 2 ^ N ) ) ) -> ( N mod ( 2 ^ N ) ) = N )
129	123, 126, 127, 114, 128	syl22anc 1327	. 2 |- ( N e. NN0 -> ( N mod ( 2 ^ N ) ) = N )
130	104, 122, 129	3eqtr3d 2664	1 |- ( N e. NN0 -> sum_ n e. (bits ` N ) ( 2 ^ n ) = N )

Syntax hints:   -. wn 3   -> wi 4   <-> wb 196   /\ wa 384   = wceq 1483   e. wcel 1990   u. cun 3572   i^i cin 3573   C_ wss 3574   (/)c0 3915   ifcif 4086   {csn 4177   class class class wbr 4653   ` cfv 5888  (class class class)co 6650   Fincfn 7955   CCcc 9934   RRcr 9935   0cc0 9936   1c1 9937   + caddc 9939   < clt 10074   <_ cle 10075   NNcn 11020   2c2 11070   NN0cn0 11292   ZZcz 11377   ZZ>=cuz 11687   RR+crp 11832  ..^cfzo 12465   mod cmo 12668   ^cexp 12860   sum_csu 14416  bitscbits 15141

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-inf2 8538  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-pre-sup 10014

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-se 5074  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-sup 8348  df-inf 8349  df-oi 8415  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-z 11378  df-uz 11688  df-rp 11833  df-fz 12327  df-fzo 12466  df-fl 12593  df-mod 12669  df-seq 12802  df-exp 12861  df-hash 13118  df-cj 13839  df-re 13840  df-im 13841  df-sqrt 13975  df-abs 13976  df-clim 14219  df-sum 14417  df-dvds 14984  df-bits 15144

This theorem is referenced by:  bitsinv2  15165  bitsf1ocnv  15166  eulerpartlemgc  30424  eulerpartlemgs2  30442