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 Yearling
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reviewed No Action Needed Slope of the tangent line from limit definition
Apr
20
awarded  Yearling
Apr
19
comment Is The *Mona Lisa* in the complement of the Mandelbrot set.
If you look at the first picture at this link: artyfactory.com/art_appreciation/portraits/chuck_close.html you will see something like the type of picture I mean. The difference is that Chuck Close has doo-dads in the squares. I would use solid colors.
Apr
10
comment Classifying Types of Paradoxes: Liar's Paradox, Et Alia
@Memming That's what I wanted. Thanks.
Apr
10
revised Classifying Types of Paradoxes: Liar's Paradox, Et Alia
Changed the reference.
Jan
15
answered How to justify “two-dimensional” induction
Dec
10
awarded  Caucus
Oct
30
comment discuss convexity of the following set?
mfl's suggestion to plot the region is a very good idea.
Oct
9
reviewed Looks OK Conditional Integral of Square of Brownian Motion?
Oct
6
answered Subset Relation: Is the subset relation a partial order?
Oct
6
answered Prove that if X is a subset of Y then X intersect Z is a subset of Y intersect Z for all sets X, Y, Z.
Sep
24
awarded  Autobiographer
Sep
8
comment The family of finite unions of half-open intervals forms a ring of sets
It the nth term and the mth term do not intersect then you have written the empty set in a complicated way. You can delete all these different versions of writing the empty set.
Sep
8
comment Why is the set of functions from the naturals to the rationals a subset of $\mathcal P(\mathbb N \times \mathbb Q)$?
What is your definition of a function? What is your definition of an element of $\mathcal{P}(\mathbb{N} \times \mathbb{Q})$?
Sep
8
comment The family of finite unions of half-open intervals forms a ring of sets
Use the distributive property for $A \cap B$. See what you get.
Aug
2
accepted Are there necessary and sufficient conditions for Krein-Milman type conclusions?
Aug
2
accepted Are there necessary and sufficient conditions so that every element in a partially ordered set is either the least element or in the upset of an atom?
Aug
2
accepted Conditions for augmenting a collection of sets so that the new sets are small but the hull is large?
Jul
2
awarded  Curious
Jun
7
answered How is derived the inductive step in mathematical induction?