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Jul
22
revised Inequalities and rearrangements
added 58 characters in body
Jul
22
comment Coordinate Systems Transformation(Rectangular to Cylindrical)
The given answer makes no sense. Evaluating a function at a given point gives a value. Plugging $P=(10,-8,6)$ into $F$ gives $72a$.
Jul
22
comment Is the substitution of standard angles while proving the equality of trigonometric formulas allowed?
This has nothing to do with trigonometric functions per se. You cannot prove the identity $(x+y)^2=x^2+x+y+y^2$ by plugging in $x=y=1$ and checking whether you get a true statement.
Jul
22
comment Calculus Apostol Exercise 1.11 number 6
I had missed the $0<y$. Sorry for the slip.
Jul
22
comment How many words can be formed using all the letters of “DAUGHTER” so that vowels always come together?
Here is an answer referring to the notion of cartesian product: math.stackexchange.com/questions/1362768/… . Maybe it is of help.
Jul
22
answered Prove the following floor function identity
Jul
22
comment Does there exists biholomorphic map(with suitable condition) from domain to open disk?
In complex analysis the condition $c>0$ for a complex number $c$ is interpreted as "$\>c$ is real and $>0\>$".
Jul
22
comment Intuitive Explanation For Why Dependent Equations Contain No Added Information?
Creating new equations using algebraic rules does not alter the solution set, but can "add information": Adding the two equations $4x+5y=13$, $3x-5y=15$ results in $7x=28$ and tells you that $x=4$, which you didn't know before.
Jul
22
answered Find the number of sets of $(a,b,c)$ for $\frac{1}{a}+\frac{1}{b}+\frac{1}{c}=\frac{29}{72}$
Jul
21
comment Why doesnt this Combinatoric work two ways?
Concerning the green flags the $X$ is just another $B$, apart from the end positions. See true blue anil's answer here: math.stackexchange.com/questions/1365698/… of which this question is for all practical purposes a duplicate.
Jul
21
comment Why doesnt this Combinatoric work two ways?
With the second method you miss all arrangements containing $GXG$.
Jul
21
comment Calculate pentagon area based on lengths of all its sides
@Ragnar: There is no planar pentagon with "inner angles" equal to $120^\circ$.
Jul
21
answered Is there is any analogue of mean value theorem for integral when the range is whole $R$?
Jul
21
answered An analytic function on the complex plane minus a discrete set of points
Jul
21
comment Formal definition of mesh.
You should indicate more clearly what kind of meshes you have in mind. Is it this: en.wikipedia.org/wiki/Polygon_mesh ?
Jul
21
answered Inequalities and rearrangements
Jul
21
revised Stuck on this proof that $ord(f) = ord(g)$
added 337 characters in body
Jul
20
revised What is the main difference between a vector space and a field?
added 273 characters in body
Jul
20
answered What is the main difference between a vector space and a field?
Jul
20
answered (Just for clarification) - Is a convex, piecewise continuous function f on an closed interval continuous?