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Sep
25
comment Propositional Logic - induction
To be as constructive as possible: if the OP really doesn't know how to start, and would like to see a solution to the first of the problems to help with the others, then this information should be in the body of the question - I would probably not vote to close if this was there.
Sep
25
comment Propositional Logic - induction
And I think that kickstart will be easier to provide if we have more information about what the user already understands, hence my vote to close as lacking context.
Sep
25
reviewed Approve Propositional Logic - induction
Sep
25
reviewed Reject Given only P(A), P(A or B), and P(B|A), can P(~A and B) be calculated?
Sep
25
revised Statement: For every real number $x$, if $x^4 + 4x^2 - 4x$ is less than zero, then x must be a number between 0 and 1
added 218 characters in body
Sep
25
revised Statement: For every real number $x$, if $x^4 + 4x^2 - 4x$ is less than zero, then x must be a number between 0 and 1
added 48 characters in body; edited title
Sep
25
answered Statement: For every real number $x$, if $x^4 + 4x^2 - 4x$ is less than zero, then x must be a number between 0 and 1
Sep
25
answered How to show that $D_n$ is closed in $GL_n$ with respect to Zariski topology?
Sep
25
comment How to show that $D_n$ is closed in $GL_n$ with respect to Zariski topology?
Hint: the function which returns the $(i,j)$-th entry of a matrix is a polynomial function on $\mathrm{GL}_n$.
Sep
25
reviewed Close Proving a boolean algebra question
Sep
25
reviewed No Action Needed Mathematical model building with dependent and independent variables
Sep
25
reviewed Reviewed problem related to duality theorem in linear programming
Sep
25
reviewed Reviewed Strangeness when using different u's in u substitution to solve an integral
Sep
25
reviewed No Action Needed Reason for correct method of solving $x^6=x^4$ versus an erroneous method
Sep
25
comment Demystify integration of $\int \frac{1}{x} \mathrm dx$
@MarioCarneiro I wanted a citation for it being the most common, I had assumed that it was the definition at least somewhere! But it's still interesting to know that Spivak does things this way round.
Sep
24
reviewed Reviewed Invertible sheaves and invertible classes in the Picard group
Sep
24
reviewed Close Polynomial sum with fractions, see if you can calculate it depending on n
Sep
24
reviewed Edit A Rank-One Reduction Formula
Sep
24
revised A Rank-One Reduction Formula
Some additional LateX
Sep
24
revised Idempotents in $M_2(\mathbb{C})$
edited title