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I'm writing a document in Latex using Overleaf. I'm not able to remove the error: "LaTeX Error: Unicode character (U+2009)". The error is due to the statement of the following:

where $V{_p{_h}}$ is  phase velocity of the desired Lamb Wave mode and $V_L$ is longitudinal velocity of the incident wave in the coupling media.

How can I correct the error?

Miyase
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Yalew Mekonnen
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  • Hi, have you tried finding this thing using the unicode converter: https://w3c.github.io/xml-entities/unicode-names.html ? – canIchangethis Nov 18 '22 at 12:09
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    This already looks wrong: $V{_p{_h}}$ what is this suppose to mean? – daleif Nov 18 '22 at 12:29
  • Seems you've input a thinspace character somewhere. You should use \, instead. However, you can add \DeclareUnicodeCharacter{2009}{\,} to your document preamble to this replacement automatically. – cabohah Nov 18 '22 at 12:33
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    the error is not due to Tex markup you have added that character – David Carlisle Nov 18 '22 at 12:35

1 Answers1

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See

https://w3c.github.io/xml-entities/unicode-names.html?is%20%E2%80%89phase

You have an invisible Unicode space character between is and phase simply delete and use a normal space.

Note you only showed a fragment of the error message. The full message highlights exactly where the character is (via the line break)

! LaTeX Error: Unicode character   (U+2009)
               not set up for use with LaTeX.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...


l.5 where $V{_p{_h}}$ is  
                            phase velocity of the desired Lamb Wave mode and...


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David Carlisle
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