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Local and Global in Math
10 minute read
Published:
Local vs Global seems to be one of the most important philosophies behind math. People in some fields call it “compactness”, others don’t. In short, it says that the property of an object is related to the property of every smaller subobject.
Rational Points of Elliptic Curves
6 minute read
Published:
This post briefly proves why the rational points of an elliptic curve is a group. The proof idea comes from MATH 214B, but I tried to use classical language.
Some Notes on Playing C++ Coroutine
8 minute read
Published:
This posts briefly introduced what I learned on C++ 20 coroutine mechanism after I used it to imitate Python generator and ayncio. REPO
Two’s complement and 2-adic number
7 minute read
Published:
This posts discusses the relation between two’s complement and 2-adic integer in math. I want to show what operations we can have if we ignore overflow.