# Hee Kwon Lee

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bio website location Yuseong-gu, Daejeon, Korea age 35 member for 2 years, 1 month seen 14 mins ago profile views 765

I am studying Algebra.

# 139 Questions

 6 Kunneth formula on product of spheres 5 Cup product on torus 5 Is $\mathbb Z _p^*=\{ 1, 2, 3, … , p-1 \}$ a cyclic group? 5 Triangle with $\sin^2 A +\sin^2 B =\sin C$ 4 ${\bf R}$ and ${\mathbb R}$ [closed]

# 2,566 Reputation

 +5 Injectivity of Inflation Homomorphism $H^1(G/K,A^K)\rightarrow H^1(G,A)$ +5 Proof of ${\rm Tor}\ (A,B)={\rm Tor}\ (B,A)$ +5 $\int_U |Du|^2\leq (\int_U u^2)^{1/2} (\int_U |D^2 u|^2 )^{1/2}$ for $u\in H^1_0(U)\cap H^2(U)$ +5 $\Delta e^i =0$ where $e_i$ is geodesic.

 5 Exponent of matrix 4 How prove this $\int_{a}^{b}xf(x)dx\le\int_{a}^{b}xg(x)dx$ 4 Minimum of two metrics is metric 4 Factorise $f(x)=x^5-x$ into a product of irreducibles in $\mathbb Z_{5}[x]$ 3 Proof involving linear maps

# 101 Tags

 20 linear-algebra × 21 8 general-topology × 4 17 differential-geometry × 41 7 multivariable-calculus × 9 8 real-analysis × 20 6 analysis × 6 8 calculus × 19 6 inequality × 4 8 limits × 5 5 riemannian-geometry × 30

# 4 Accounts

 Mathematics 2,566 rep 1620 MathOverflow 111 rep 3 Stack Overflow 101 rep TeX - LaTeX 101 rep 1

 Proofreader Inquisitive Popular Question Strunk & White Excavator Fanatic Yearling × 2 Civic Duty Curious Promoter

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