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seen Jan 14 at 10:06

May
18
awarded  Teacher
Apr
18
accepted Showing existence of a spanning tree in a graph with two kinds of edges using $k$ of one kind of edge
Apr
18
awarded  Critic
Apr
18
answered Does having an orthonormal basis imply that the vectors in that basis must all be orthongonal?
Apr
18
awarded  Organizer
Apr
18
revised Random Variables
Adding homework tag
Apr
18
suggested suggested edit on Random Variables
Apr
18
suggested suggested edit on Find a basis for $\mathbf{W}^{\perp}$ given spanning vectors of $\mathbf{W}$
Apr
18
revised Does having an orthonormal basis imply that the vectors in that basis must all be orthongonal?
Formatting
Apr
18
suggested suggested edit on Does having an orthonormal basis imply that the vectors in that basis must all be orthongonal?
Apr
17
revised Generating function with dependencies
Clarifying question
Apr
17
awarded  Citizen Patrol
Apr
17
asked Generating function with dependencies
Apr
17
comment Showing existence of a spanning tree in a graph with two kinds of edges using $k$ of one kind of edge
I think you need a slight tweak here. If you order your edges such that when you add your first edge, it creates a cycle of all blue edges, you end up with an $A'$ that still has $\ell$ blue edges. However, I believe that you can always choose your edge to add such that it does not create an all blue cycle (assuming $\ell\neq m$), because if you can't, then you already have a spanning tree with the maximum number of blue edges, namely $m$ of them. Convoluted, but I think this covers it.
Apr
17
awarded  Editor
Apr
17
revised Inserting if else in a mathematical expression is it possible
LaTeX-ified
Apr
17
suggested suggested edit on Inserting if else in a mathematical expression is it possible
Apr
17
revised Inserting if else in a mathematical expression is it possible
LaTeX-ified
Apr
17
suggested suggested edit on Inserting if else in a mathematical expression is it possible
Apr
17
comment Calculation of a 'double' sum
How are you interpreting your bounds on the sums when $\frac{n}{2}$ and $\sqrt{n}$ are not whole numbers?