Identifier
- St001930: Binary words ⟶ ℤ
Values
=>
0=>0
1=>0
00=>1
01=>0
10=>1
11=>1
000=>3
001=>1
010=>2
011=>2
100=>3
101=>1
110=>3
111=>3
0000=>6
0001=>3
0010=>4
0011=>4
0100=>5
0101=>2
0110=>5
0111=>5
1000=>6
1001=>3
1010=>4
1011=>4
1100=>6
1101=>3
1110=>6
1111=>6
00000=>10
00001=>6
00010=>7
00011=>7
00100=>8
00101=>4
00110=>8
00111=>8
01000=>9
01001=>5
01010=>6
01011=>6
01100=>9
01101=>5
01110=>9
01111=>9
10000=>10
10001=>6
10010=>7
10011=>7
10100=>8
10101=>4
10110=>8
10111=>8
11000=>10
11001=>6
11010=>7
11011=>7
11100=>10
11101=>6
11110=>10
11111=>10
000000=>15
000001=>10
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000100=>12
000101=>7
000110=>12
000111=>12
001000=>13
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001010=>9
001011=>9
001100=>13
001101=>8
001110=>13
001111=>13
010000=>14
010001=>9
010010=>10
010011=>10
010100=>11
010101=>6
010110=>11
010111=>11
011000=>14
011001=>9
011010=>10
011011=>10
011100=>14
011101=>9
011110=>14
011111=>14
100000=>15
100001=>10
100010=>11
100011=>11
100100=>12
100101=>7
100110=>12
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101000=>13
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101010=>9
101011=>9
101100=>13
101101=>8
101110=>13
101111=>13
110000=>15
110001=>10
110010=>11
110011=>11
110100=>12
110101=>7
110110=>12
110111=>12
111000=>15
111001=>10
111010=>11
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111100=>15
111101=>10
111110=>15
111111=>15
0000000=>21
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0001000=>18
0001001=>12
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0001011=>13
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0011000=>19
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0011110=>19
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0100000=>20
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1000000=>21
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1011101=>13
1011110=>19
1011111=>19
1100000=>21
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1101000=>18
1101001=>12
1101010=>13
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1101101=>12
1101110=>18
1101111=>18
1110000=>21
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1110111=>17
1111000=>21
1111001=>15
1111010=>16
1111011=>16
1111100=>21
1111101=>15
1111110=>21
1111111=>21
00000000=>28
00000001=>21
00000010=>22
00000011=>22
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00000110=>23
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00101000=>22
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01111111=>27
10000000=>28
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10111111=>26
11000000=>28
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11001111=>24
11010000=>25
11010001=>18
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11010011=>19
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11011000=>25
11011001=>18
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11011101=>18
11011110=>25
11011111=>25
11100000=>28
11100001=>21
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11100011=>22
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11101010=>18
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11101101=>17
11101110=>24
11101111=>24
11110000=>28
11110001=>21
11110010=>22
11110011=>22
11110100=>23
11110101=>16
11110110=>23
11110111=>23
11111000=>28
11111001=>21
11111010=>22
11111011=>22
11111100=>28
11111101=>21
11111110=>28
11111111=>28
000000000=>36
000000001=>28
000000010=>29
000000011=>29
000000100=>30
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000000111=>30
000001000=>31
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001000000=>34
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001010011=>23
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001011111=>30
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001111000=>34
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001111011=>27
001111100=>34
001111101=>26
001111110=>34
001111111=>34
010000000=>35
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010000011=>28
010000100=>29
010000101=>21
010000110=>29
010000111=>29
010001000=>30
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010001111=>30
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011110111=>29
011111000=>35
011111001=>27
011111010=>28
011111011=>28
011111100=>35
011111101=>27
011111110=>35
011111111=>35
100000000=>36
100000001=>28
100000010=>29
100000011=>29
100000100=>30
100000101=>22
100000110=>30
100000111=>30
100001000=>31
100001001=>23
100001010=>24
100001011=>24
100001100=>31
100001101=>23
100001110=>31
100001111=>31
100010000=>32
100010001=>24
100010010=>25
100010011=>25
100010100=>26
100010101=>18
100010110=>26
100010111=>26
100011000=>32
100011001=>24
100011010=>25
100011011=>25
100011100=>32
100011101=>24
100011110=>32
100011111=>32
100100000=>33
100100001=>25
100100010=>26
100100011=>26
100100100=>27
100100101=>19
100100110=>27
100100111=>27
100101000=>28
100101001=>20
100101010=>21
100101011=>21
100101100=>28
100101101=>20
100101110=>28
100101111=>28
100110000=>33
100110001=>25
100110010=>26
100110011=>26
100110100=>27
100110101=>19
100110110=>27
100110111=>27
100111000=>33
100111001=>25
100111010=>26
100111011=>26
100111100=>33
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100111110=>33
100111111=>33
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101000100=>28
101000101=>20
101000110=>28
101000111=>28
101001000=>29
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101001010=>22
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101001101=>21
101001110=>29
101001111=>29
101010000=>30
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101010111=>24
101011000=>30
101011001=>22
101011010=>23
101011011=>23
101011100=>30
101011101=>22
101011110=>30
101011111=>30
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101100011=>27
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101100101=>20
101100110=>28
101100111=>28
101101000=>29
101101001=>21
101101010=>22
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101101101=>21
101101110=>29
101101111=>29
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101111110=>34
101111111=>34
110000000=>36
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110010001=>24
110010010=>25
110010011=>25
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110011010=>25
110011011=>25
110011100=>32
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110011110=>32
110011111=>32
110100000=>33
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110100010=>26
110100011=>26
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110100101=>19
110100110=>27
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110101010=>21
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110101100=>28
110101101=>20
110101110=>28
110101111=>28
110110000=>33
110110001=>25
110110010=>26
110110011=>26
110110100=>27
110110101=>19
110110110=>27
110110111=>27
110111000=>33
110111001=>25
110111010=>26
110111011=>26
110111100=>33
110111101=>25
110111110=>33
110111111=>33
111000000=>36
111000001=>28
111000010=>29
111000011=>29
111000100=>30
111000101=>22
111000110=>30
111000111=>30
111001000=>31
111001001=>23
111001010=>24
111001011=>24
111001100=>31
111001101=>23
111001110=>31
111001111=>31
111010000=>32
111010001=>24
111010010=>25
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111010100=>26
111010101=>18
111010110=>26
111010111=>26
111011000=>32
111011001=>24
111011010=>25
111011011=>25
111011100=>32
111011101=>24
111011110=>32
111011111=>32
111100000=>36
111100001=>28
111100010=>29
111100011=>29
111100100=>30
111100101=>22
111100110=>30
111100111=>30
111101000=>31
111101001=>23
111101010=>24
111101011=>24
111101100=>31
111101101=>23
111101110=>31
111101111=>31
111110000=>36
111110001=>28
111110010=>29
111110011=>29
111110100=>30
111110101=>22
111110110=>30
111110111=>30
111111000=>36
111111001=>28
111111010=>29
111111011=>29
111111100=>36
111111101=>28
111111110=>36
111111111=>36
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Description
The weak major index of a binary word.
This is the sum of the positions of the weak descents, that is, for a word $w = (w_1,\dots,w_n)$,
$$ \sum_{\substack{1\leq i < n\\ w_i\geq w_{i+1}}} i. $$
This is the sum of the positions of the weak descents, that is, for a word $w = (w_1,\dots,w_n)$,
$$ \sum_{\substack{1\leq i < n\\ w_i\geq w_{i+1}}} i. $$
Code
def statistic(w): return sum(i for i in range(1, len(w)) if w[i-1] >= w[i])
Created
Nov 05, 2023 at 15:59 by Martin Rubey
Updated
Nov 05, 2023 at 15:59 by Martin Rubey
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