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I am doing CS homework and the problem is asking what is the result of the following ⎡2.3⎤, problem is when I am googling it I am mostly yielding results that merely give the Unicode equivalent of the symbols, or I am getting full blown matrix problems, and I'm not sure if this is related to that. I forgot what the symbol meant from my previous classes and I can't even find the official mathematical name for it to google the definition.

Also if anyone has tips on how they would construct a query to find relevant answers to the question, I would love to learn how to improve my search engine skills. Thanks!

Mauro ALLEGRANZA
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Micah
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  • Your question is really not on-topic here (it might be more appropriate to [tex.se], though probably not). For the future, a place to start might be https://detexify.kirelabs.org/classify.html . After a couple of tries, Detexify finds the symbol \lceil, which you can Google for yourself. – Xander Henderson Aug 25 '22 at 21:31
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    Most textbook authors collect the notation used in a designated section with pages where the notation was introduced or first used. Typically the notation will be defined for Readers at that point. – hardmath Aug 25 '22 at 21:34
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    Also use \left\lceil \frac ab\right\rceil to get $\left\lceil \frac ab\right\rceil$ etc. – Тyma Gaidash Aug 25 '22 at 21:38

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If this is $\lceil\cdot\rceil$, achieved by $\lceil$ and $\rceil$, it is known as the ceiling function, which returns the smallest integer not less than the argument. For example, $\lceil\pi\rceil=4.$

Andrew Chin
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