Hello there! Im in a class of signal and communication systems and found this symbol:(adsbygoogle = window.adsbygoogle || []).push({});

‹[·]› But I cant figure what it means, teacher told us to research it. Been reading books like crazy and cant find anything. Hope you can help me.

I put a picture of how he used it, if that helps you.

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# MATH SYMBOL Help Figure?

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