---
name: "ripser-coeff"
section: "1"
platform: "linux"
package: "ripser"
version: "1.2.1-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ripser-coeff"
---

# ripser-coeff(1)

fast computation of persistent homology of flag complexes, with coefficients in chosen field

## NAME

ripser-coeff - fast computation of persistent homology of flag complexes, with coefficients in chosen field

## SYNOPSIS

**ripser-coeff** \[options...\] \[filename\]

## OPTIONS

- **--help**

  Show help message and quit.

- **--format** \<format\>

  Use the specified file format for the input. Options are:

  • lower-distance (lower triangular distance matrix; default)

  • upper-distance (upper triangular distance matrix)

  • distance       (full distance matrix)

  • point-cloud    (point cloud in Euclidean space)

  • dipha          (distance matrix in DIPHA file format)

  • sparse         (sparse distance matrix in sparse triplet format)

  • binary         (lower triangular distance matrix in binary format)

- **--dim** \<k\>

  Compute persistent homology up to dimension k

- **--threshold \<t\>**

  Compute Rips complexes up to diameter t

- **--modulus \<p\>**

  Compute homology with coefficients in the prime field Z/pZ

- **--ratio \<r\>**

  Only show persistence pairs with death/birth ratio \> r

## SEE ALSO

[**ripser**(1)](/ripser/1.md)