## Annoying Precision

Annoying Precision offers insight into high level mathematical equations and solutions for the reader.

### Featured Posts

#### Drawing subgroups of the modular group

Previously we learned how to count the finite index subgroups of the modular group . The worst thing about that post was that it didn’t include any pictures of these subgroups. Today we’ll fix that. The pictures in this post can be interpreted in at least two ways. On the one hand, they are graphs of […]

#### Drawing subgroups of the modular group

Previously we learned how to count the finite index subgroups of the modular group . The worst thing about that post was that it didn’t include any pictures of these subgroups. Today we’ll fix that. The pictures in this post can be interpreted in at least two ways. On the one hand, they are graphs of […]

#### Topological Diophantine equations

The problem of finding solutions to Diophantine equations can be recast in the following abstract form. Let be a commutative ring, which in the most classical case might be a number field like or the ring of integers in a number field like . Suppose we want to find solutions, over , of a system […]

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- Nov 29, 2015 Drawing subgroups of the modular group
- Nov 28, 2015 Connected components in a distributive category
- Nov 28, 2015 Distributive categories
- Nov 27, 2015 The Lawvere theory of Boolean functions
- Nov 26, 2015 Conjugacy classes of finite index subgroups
- Nov 25, 2015 We apologize for the interruption in service
- Nov 18, 2015 Forms and Galois cohomology
- Nov 17, 2015 Stating Galois descent
- Nov 16, 2015 Finite index subgroups of the modular group
- Nov 14, 2015 Projective representations are homotopy fixed points
- Nov 14, 2015 Projective representations give categorical representations
- Nov 13, 2015 Projective representations
- Nov 12, 2015 Fixed points of group actions on categories
- Nov 11, 2015 Units
- Nov 11, 2015 Units and basepoints
- Nov 10, 2015 Group actions on categories
- Nov 09, 2015 The puzzle of Galois descent
- Nov 08, 2015 Hecke operators are also relative positions
- Nov 07, 2015 Double cosets are relative positions
- Nov 06, 2015 A monad is just a monoid in the category of endofunctors, what’s the problem?
- Nov 05, 2015 The categorical exponential formula
- Nov 04, 2015 The answer to the puzzle
- Nov 03, 2015 MaBloWriMo continues with a hint
- Nov 02, 2015 MaBloWriMo begins with a puzzle
- Oct 26, 2015 Dualizable objects (and morphisms)