#1109080 Improve the default font for emacs such that it can distinguish between the variants of Greek letters

Package:
emacs-gtk
Source:
emacs-gtk
Description:
GNU Emacs editor (with GTK+ GUI support)
Submitter:
Peter Müller
Date:
2025-07-10 23:33:02 UTC
Severity:
normal
#1109080#5
Date:
2025-07-10 23:31:45 UTC
From:
To:
Open emacs-gtk and type in the following into the scratch buffer:

small Epsilon U+03B5: ε
straight Epsilon U+03F5: ϵ
small Theta U+03B8: θ
script Theta U+03D1: ϑ
small Pi U+03C0: π
small omega Pi (a variant of small Pi looking like small Omega) U+03D6: ϖ
small Rho U+03C1: ρ
tailed small Rho U+03F1: ϱ
small Phi U+03C6: φ
technical small Phi U+03D5: ϕ

On my system, I see the same glyphs for each pair of the variants despite the underlying unicode positions being different; cf. the attachment.

M-x describe-font yields this:

name (opened by): -GOOG-Noto Sans Mono-normal-normal-normal-*-13-*-*-*-*-0-iso10646-1
        full name: Noto Sans Mono:pixelsize=13:foundry=GOOG:weight=normal:slant=normal:width=normal:scalable=true
        file name: /usr/share/fonts/truetype/noto/NotoSansMono-Regular.ttf
             size: 13
           height: 18
  baseline-offset:  0
relative-compose:  0
   default-ascent:  0
           ascent: 14
          descent:  4
    average-width:  8
      space-width:  8
        max-width:  8

I kindly ask the the font itself is repaired (in this case, please reassign the bug report), or that emacs uses a different font by default.

Gratefully,
Peter