I am an engineer who is in love with math and lifelong math student. I love to learn new things in mathematics for self-satisfaction. My idols are Gauss , Euler , Ramanujan because they were in love with math as I feel.

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revised To determine if a 2 variable symmetric function is addition formula of one variable function or not?
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revised To determine if a 2 variable symmetric function is addition formula of one variable function or not?
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answered To determine if a 2 variable symmetric function is addition formula of one variable function or not?
Feb
4
comment To determine if a 2 variable symmetric function is addition formula of one variable function or not?
@JulianRosen I am interested in any $U(x,y)$, not only rationals. I just wanted to show 2 simple examples to demonstrate the situation. I would like to find the formula of the classify which condition is required to to be an addition formula of a symmetric $U(x,y)$
Feb
4
revised To determine if a 2 variable symmetric function is addition formula of one variable function or not?
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Feb
4
revised To determine if a 2 variable symmetric function is addition formula of one variable function or not?
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Feb
4
asked To determine if a 2 variable symmetric function is addition formula of one variable function or not?
Jan
16
awarded Autobiographer
Jan
15
comment What is lower limit condition of a surface of a tetrahedron?
Can we have only one lower condition ? or impossible. If it exists, it should be cyclic .for example, the lower condition could be $|S_2-S_3|+|S_3-S_4|+|S_2-S_4|<S_1$ but I do not know if it exists such cyclic condition or how to prove that it is impossible to eliminate 3 necessary condition into one condition.
Jan
14
awarded Popular Question
Jan
14
revised What is lower limit condition of a surface of a tetrahedron?
edited title
Jan
13
asked What is lower limit condition of a surface of a tetrahedron?
Jan
11
revised Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$?
I corrected mistyped 3 as 2
Jan
8
awarded Scholar
Jan
8
accepted Investigation of $\sum \limits_{k=-\infty}^\infty \frac{x^{k+n}}{ \Gamma(k+n+1)}$ where $n \in C$?
Jan
8
revised Investigation of $\sum \limits_{k=-\infty}^\infty \frac{x^{k+n}}{ \Gamma(k+n+1)}$ where $n \in C$?
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Jan
7
revised How can I solve the differential equation $y'+y^{2}=f(x)$?
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Jan
7
revised How can I solve the differential equation $y'+y^{2}=f(x)$?
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Jan
5
revised Investigation of $\sum \limits_{k=-\infty}^\infty \frac{x^{k+n}}{ \Gamma(k+n+1)}$ where $n \in C$?
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Jan
5
revised Investigation of $\sum \limits_{k=-\infty}^\infty \frac{x^{k+n}}{ \Gamma(k+n+1)}$ where $n \in C$?
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