---
title: path_math_label (latest version)
description: API reference for qiskit_noise_learning.visualizations.path_math_label in the latest version of qiskit-noise-learning
source: https://quantum.cloud.ibm.com/docs/en/api/qiskit-noise-learning/generated/visualizations-path-math-label
---

# qiskit\_noise\_learning.visualizations.path\_math\_label

`qiskit_noise_learning.visualizations.path_math_label(gate_set: GateSet, path: Path, style: Literal['transition', 'formula'] = 'transition', noise_site: Mapping[str, Literal['before', 'after']] | None = None, repeatable_only: bool = False, qubit_labels: Mapping[int, str] | None = None) → str`

[GitHub](https://github.com/Qiskit/qiskit-noise-learning/tree/stable/0.1/qiskit_noise_learning/visualizations/fidelity_math_labels.py)

Return a math-mode LaTeX label for a path.

**Parameters**

- **gate\_set** – The gate set the path’s fidelity indices belong to, used to look up each gate’s [`math_label`](/docs/api/qiskit-noise-learning/generated/gate-sets-gate#math_label "qiskit_noise_learning.gate_sets.Gate.math_label").
- **path** – The path to label.
- **style** – The style to use for each fidelity index label. `"transition"` displays the Pauli operator transitions induced by each gate, and `"formula"` displays the fidelity label formula associated with this path.
- **noise\_site** – An optional noise-site mapping forwarded to [`fidelity_index_math_label()`](/docs/api/qiskit-noise-learning/generated/visualizations-fidelity-index-math-label "qiskit_noise_learning.visualizations.fidelity_index_math_label") for the `"formula"` style (see that function for details).
- **repeatable\_only** – If `True`, only render the repeatable fragment without brackets or fragment-depth exponent.
- **qubit\_labels** – An optional mapping from qubit index to a display symbol, used to relabel the qubit subscripts (e.g. `{25: "i", 26: "j"}` renders `X_{25}` as `X_{i}`). Indices absent from the mapping render as their integer value.

**Returns**

A math-mode LaTeX label.