# Curtis W

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214
bio website UofMath.wordpress.com location Edmonton, Canada age 24 member for 1 year, 1 month seen 12 hours ago profile views 314

Algebra student interested in studying the representation theory of Lie algebras and Lie superalgebras.

# 20 Questions

 6 Invariance of the Lebesgue integral. 5 When is a local, reduced, (commutative) ring an integral domain? 4 Lebesgue points of density and similar notions 4 Show that the union over a collection of compact cubes in $\mathbb{R}^n$ is Lebesgue measurable 3 Morphisms of quasi-affine varieties and locally closed sub-varieties

# 637 Reputation

 +2 Orbits in G = $Z_6$ by listing 2 element subsets in G. +2 Extend length of the vector +10 Two Projective closures of $\mathbb{A}^1\setminus\{0\}$ which are not isomorphic as varieties. +15 How to show that $AX=B$ has unique solution for invertible matrix $A$

 5 If $A$ and $B$ are sets of real numbers, then $(A \cup B)^{\circ} \supseteq A^ {\circ}\cup B^{\circ}$ 2 Linear Transformation and Linear Independence Question 2 Prove that for any nonzero vectors $\bf u$ and $\bf a$ in $\Bbb R^n$, the vector $\bf a$ is orthogonal to ${\bf u} - \mathrm{proj}_{\bf a}{\bf u}$. 2 How to show that $AX=B$ has unique solution for invertible matrix $A$ 2 What does “$\cong$” sign represent?

# 38 Tags

 9 linear-algebra × 6 3 vector-spaces × 2 6 real-analysis × 12 2 orthogonality 5 general-topology × 2 2 notation 5 proof-verification 2 inverse 4 abstract-algebra × 11 2 matrices

# 4 Accounts

 Mathematics 637 rep 214 Ask Ubuntu 101 rep 2 MathOverflow 101 rep 2 History of Science and Math 101 rep 2