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Algorithms

Heap, Binary Tree, Data Structure it doesn't matter. This tag should be used for anything Algorithm & Data Structure focused.

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A(4) = 4: one more vector settles Z_4^9 x Z_2^2

A(4) = 4: one more vector settles Z_4^9 x Z_2^2

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11 min read
2-groups whose involutions are all central: one restriction lemma settles every Z_4^a x Z_2^b with a <= 7

2-groups whose involutions are all central: one restriction lemma settles every Z_4^a x Z_2^b with a <= 7

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9 min read
One modulo gives you a Korean Saju day pillar (and Seoul's 1900 time zone breaks it)

One modulo gives you a Korean Saju day pillar (and Seoul's 1900 time zone breaks it)

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3 min read
2916. Subarrays Distinct Element Sum of Squares II

2916. Subarrays Distinct Element Sum of Squares II

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4 min read
10 Algorithm Patterns That Crack Most Coding Problems, Visualized

10 Algorithm Patterns That Crack Most Coding Problems, Visualized

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16 min read
Dynamic Programming Without the Panic

Dynamic Programming Without the Panic

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5 min read
Cube translates in non-abelian groups: what commutativity is worth

Cube translates in non-abelian groups: what commutativity is worth

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13 min read
Is senior cat food lower in calories? I paired 18 senior foods with their adult twins to check

Is senior cat food lower in calories? I paired 18 senior foods with their adult twins to check

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6 min read
The Littlewood conjecture in October 2026: what is proved, what changed in 2026, what is open

The Littlewood conjecture in October 2026: what is proved, what changed in 2026, what is open

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16 min read
The Anchor Step: One Mod-12 Formula That Determines Every Position in a Zi Wei Dou Shu Chart

The Anchor Step: One Mod-12 Formula That Determines Every Position in a Zi Wei Dou Shu Chart

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4 min read
Kakeya sets of rank r over F_2: why 2^(3n/4) is optimal

Kakeya sets of rank r over F_2: why 2^(3n/4) is optimal

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13 min read
Kakeya sets of higher rank over a fixed finite field: the second-order term

Kakeya sets of higher rank over a fixed finite field: the second-order term

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10 min read
Lehmer's problem in October 2026: what is proved, what has been computed, what is open

Lehmer's problem in October 2026: what is proved, what has been computed, what is open

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15 min read
Legendre's conjecture in October 2026: what is proved, what has been computed, what is open

Legendre's conjecture in October 2026: what is proved, what has been computed, what is open

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14 min read
How to Evaluate a Copied Polymarket Trade in Python

How to Evaluate a Copied Polymarket Trade in Python

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6 min read
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