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Cake day: July 2nd, 2023

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  • i wonder what the inverse of the letters in the english alphabet are. since it has a non-prime number of letters (26 to be exact), we know that some letters won’t have inverses. i wonder which letters don’t have inverses. i guess it would be pretty easy to find out if you use the standard alphabet ordering and then port the alphabet over to ℤ/26ℤ, but that’s not a particularly satisfying answer.




  • affiliate@lemmy.worldtoScience Memes@mander.xyzlab toys
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    8 days ago

    i was in a group call with 6 mathematicians, and it came time to order our names in the paper we were writing. in math papers, the names are always ordered alphabetically. we had to pull up a picture of the alphabet because none of us could remember which way the letters are ordered.








  • affiliate@lemmy.worldtoScience Memes@mander.xyzThis feels wrong. I love it.
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    16 days ago

    whether or not i is a scalar depends entirely on the context.

    every vector space has an associated field of coefficients. in practice, this field is typically the real numbers. but you can have lots of other kinds of vector spaces as well, and they can be useful for certain things.

    anyways, if you have a vector space over the complex numbers, then i is a scalar, because it is a complex number. if you have a vector space over the real numbers, then i is not a scalar, because it’s not a real number.

    its worth mentioning that you can view the complex numbers as a vector space over itself. this is just a fancy way of saying that you can add complex numbers together, and you can multiply a complex number by a complex number. (one of those numbers is playing the role of scalar, and the other is playing the role of vector.) but you can also view the complex numbers as a vector space over the real numbers. and this is just a fancy way of saying that you can add complex numbers, and you can multiply a complex number by a real number.