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I'm revising my thesis. I'm in a U.S.A university (American English).

My Prof asks me to change "Naive Bayes" to "Naïve Bayes" in my thesis. However, things are not easy.

First thing is that how to add two dots above i. I solved this issue by using Microsoft Word, where "Naive" can be automatically converted to "Naïve". Then I copy it and paste to the Texmaker and run the LaTeX.

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But the result is not what I want

enter image description here

marked as duplicate by Alan Munn, Mico, CarLaTeX, TeXnician, Svend Tveskæg Apr 23 '17 at 15:49

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 10
    Use Na\"ive and it should go well. – egreg Apr 23 '17 at 15:05
  • 4
    If you're curious, the reason you got the weird output when putting "Naïve" into your document directly: in Unicode the character ï is U+00EF LATIN SMALL LETTER I WITH DIAERESIS, which in the UTF-8 encoding is encoded by a sequence of two bytes: C3 (195) followed by AF (175). Without \usepackage[utf8]{inputenc} this gets interpreted as two 8-bit characters. In the T1 font encoding (Wikipedia), C3 is à and AF is ŕ. – ShreevatsaR Apr 23 '17 at 19:47
  • And I think the first question was not answered, Naive Bayes is correct not Naïve Bayes. – Chamberlain Foncha Jan 26 '18 at 19:46
  • @samcarter I'm so sorry because I was so busy writing my graduate dissertation during that time, and I traveled for a long time after graduation. I would like to express my gratitude and appreciation to all the people who had helped me and I have accepted all my questions now. Thank you for reminding me. – Alex Jan 27 '18 at 5:50

Either use


or add


to your preamble, which will allow you to type


Note that the longer Na\"{\i}ve is not required, unless your output encoding is T2A or similar that doesn't fully support the Latin alphabet.








enter image description here

  • The first proposal did not work for me. “na\"{\i}ve” produces a correct “naïve”, while “na\"{i}ve” in text mode yields i with 3 dots above the stick! See hevea.inria.fr/examples/test/sym.html – Yaroslav Nikitenko Nov 28 '17 at 1:25
  • @YaroslavNikitenko What TeX distribution are you running? – egreg Nov 28 '17 at 9:09
  • I use the up-to-date TUG distribution. – Yaroslav Nikitenko Nov 28 '17 at 20:39
  • @YaroslavNikitenko Your edit was unnecessary; and now I added an explicit example that shows Na\"ive works as stated. If it doesn't work in your setup, please ask a question with the necessary details. But you probably have \usepackage[T2A]{fontenc}. – egreg Nov 28 '17 at 21:13
  • With LaTeX release 2018-04-01 or later, \usepackage[utf8]{inputenc} is not necessary any longer (when, of course, the document is UTF-8 encoded). – egreg Aug 26 '18 at 17:42

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