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wide mathtext accents are mis-centered #19299
Description
Bug report
Bug summary
All's in the title.
Code for reproduction
from pylab import *
figtext(.5, .5, r"$\widebar{abc} \qquad \mathrm{\widebar{abc}}$")Actual outcome
Expected outcome
The bar should be correctly centered. (The italic version is still ok-ish, but the roman one is far too offset.)
Likewise for \widehat and \widetilde.
Matplotlib version
- Operating system: linux
- Matplotlib version (
import matplotlib; print(matplotlib.__version__)): HEAD (3.3+) - Matplotlib backend (
print(matplotlib.get_backend())): qt5agg - Python version: 3.9
- Jupyter version (if applicable):
- Other libraries:
From a quick look, this is due to the sym.width/4 horizontal correction added to an HCentered box in accent(). Indeed replacing centered by just accent_box appears to fix the issue... but now the italic correction is lost when using italics.
I think the correct solution likely implies doing an exegesis of node 12 of the TeXbook's appendix G (p442), or any of the articles linked at #18916 (comment).
Activity
github-actions commentedon Sep 29, 2023
This issue has been marked "inactive" because it has been 365 days since the last comment. If this issue is still present in recent Matplotlib releases, or the feature request is still wanted, please leave a comment and this label will be removed. If there are no updates in another 30 days, this issue will be automatically closed, but you are free to re-open or create a new issue if needed. We value issue reports, and this procedure is meant to help us resurface and prioritize issues that have not been addressed yet, not make them disappear. Thanks for your help!
anntzer commentedon Feb 6, 2026
Closed by #31069.