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Old 01-27-2014, 07:03 AM   #1
Nick Payne
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Cube root symbol not displaying on Aura HD
I have an epub (G. H. Hardy's "A Mathematician's Apology") that contains cube root symbols (Unicode char 0x221B), and regardless of what font I choose for text display on the reader, this symbol just displays as a square hollow box. If I view the same epub on the PC using either Sigil or the Calibre ebook viewer, the symbols show correctly. I also have the Charis SIL Modified and Charis SIL compact fonts that I downloaded from here installed on the Aura HD, and they also just show the symbol as a hollow square, though the same font on the PC shows the cube root symbol correctly.

The Aurd HD is running firmware 3.1.1.
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Old 01-27-2014, 09:45 PM   #2
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I've had better luck using Amasis font from Nook when reading books with math formulas.
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Old 01-28-2014, 12:58 AM   #3
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Quote:
Originally Posted by Nick Payne View Post
I have an epub (G. H. Hardy's "A Mathematician's Apology") that contains cube root symbols (Unicode char 0x221B), and regardless of what font I choose for text display on the reader, this symbol just displays as a square hollow box.
On my Aura HD, the cube root symbol (∛) displays when I select Deja Vu Serif or Code 2000 as a font. I used the &# 8731; format to enter it in a test ebook.

Regards,
David
Last edited by DNSB; 01-28-2014 at 01:00 AM. Reason: added the &# code in code tags to see if it would survive
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Old 01-28-2014, 08:21 AM   #4
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Quote:
Originally Posted by DNSB View Post
On my Aura HD, the cube root symbol (∛) displays when I select Deja Vu Serif or Code 2000 as a font. I used the &# 8731; format to enter it in a test ebook.
Thanks. I copied the DejaVu Serif ttf files from /usr/share/fonts/truetype/dejavu to the fonts folder on the reader, renamed the files, and rebooted. I can now see the cube root symbols when I select that font. I can't say that I particularly care for the look of the font, though. It looks a bit too much like proportionally spaced typewriter output.
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Old 02-01-2014, 12:07 AM   #5
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Originally Posted by Nick Payne View Post
Thanks. I copied the DejaVu Serif ttf files from /usr/share/fonts/truetype/dejavu to the fonts folder on the reader, renamed the files, and rebooted. I can now see the cube root symbols when I select that font. I can't say that I particularly care for the look of the font, though. It looks a bit too much like proportionally spaced typewriter output.
True, it's not the prettiest font but I keep it around for when I run into an ebook that uses a lot of Greek characters or math operators which my preferred font's don't support.

Regards,
David
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