# user37116

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reputation
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bio website matematica.kr location Taejeon, Korea age 33 member for 9 months seen 2 hours ago profile views 45

I finished my doctoral degree at KAIST, Korea.

My major is differential geometry and Riemannian geometry.

Mainly I studied a Lie group and Lie algebra, which is related with Ricci soliton and positively curved manifolds.

Also another my interesting area is a Polar action and Ricci flow(PDE).

# 32 Questions

 5 Is $\mathbb Z _p^*=\{ 1, 2, 3, … , p-1 \}$ a cyclic group? 4 Triangle with $\sin^2 A +\sin^2 B =\sin C$ 4 Example of symplectic manifold 3 $g_\ast : H_1(X; {\bf Z}) \rightarrow H_1(X;{\bf Z})$ 3 Olympiad : The maximum number of pairs whose distance is $1$ when any pairwise distance is at least $1$

# 688 Reputation

 +10 Compactness of semisimple Lie algebra +5 Example of symplectic manifold +5 Proof of Lie theorem on solvable Lie algebra +5 Orientability of $P_{\bf R}T{\bf RP}^{2n}$

 3 Factorise $f(x)=x^5-x$ into a product of irreducibles in $\mathbb Z_{5}[x]$ 2 Complex Conjugate Eigenvectors Proof 2 find $rank(T)$ when $T: P_2\to P_2:T(p(x)) = p(x+1)$ 2 Approximating cube root function for small values of $x$ 1 Parametric equation of a cone

# 41 Tags

 4 linear-algebra × 5 2 power-series 3 calculus × 4 1 matrices × 2 3 polynomials 1 limit 3 factoring 1 trace 2 multivariable-calculus × 3 1 derivatives

# 2 Accounts

 Mathematics 688 rep 8 Stack Overflow 101 rep