I'm writing my dissertation in Portuguese but the latex is finding this kind of error. In fact, I'm using some mathematical characters. How do I resolve this? Here below is the location of the error in the latex source code. Thank you
Sendo que as tensões de entrada $U_{OA}$ e a de saída $U_{OA'}$ são constantes e iguais e o ângulo projetado entre essas tensões é igual a $7,5^{\circ}$, então deduz que os ângulos $\widehat{\left (OA,AA' \right )}$ e ̂$\widehat{\left ( AA,A'O \right )}$ são iguais a $86,25^{\circ}$, mostrado na figura \ref{diagramafasauto}. Note-se que Co representa a extensão de C (fase c) e OCo a bissetriz do ângulo $\widehat{\left ( OA,AB \right )}$, então o valor do ângulo $\widehat{\left ( OA,OCo \right )}$ é igual a $60^{\circ}$. Deduz-se então o ângulo $\widehat{\left ( OA',OCo \right )}$.
Best Answer
In the following part of your input,
specifically this part:
the sequence of Unicode characters between the dollar signs (inclusive) is:
You may not be able to see it in your editor or here, but if you copy and paste it into a Unicode character viewer like this one, you will be able to see it.
That U+0302 COMBINING CIRCUMFLEX ACCENT is meaningless there, and you probably don't want it. What you want there between (strictly) the dollar signs is probably just
e
. With just this change to your input, it works:producing:
That solves the problem, but note that without the fix, TeX actually tells you everything you need to know, pointing out the exact character at which there is a problem:
— the top line is everything that was read before the error happened, and the bottom line is what is not yet read.
A word of advice: you can avoid such super-long lines in your input. TeX (by default) treats a single newline character as equivalent to a space, so you may have an easier time debugging errors (if you don't take time to learn the error-line format) if you have shorter lines. (Of course, long lines are not a problem if you know how to deal with them.)