real analysis related issues & queries in MathXchanger

Is there any way to represent any function on a z=0 plane transform into an arbitrary differentiable continuous non-linear surface?

metric-spaces 3d mobius-transformation nonlinear-analysis geometric-transformation
Updated June 05, 2020 22:20 PM

$x\cos(2x) + x^2\cos(4x) +... + x^n\cos(2nx)$

complex-analysis
Updated June 05, 2020 22:20 PM

Is my proof that nonnegative polynomials on $[0,1]$ form a convex set correct?

convex-analysis solution-verification
Updated June 05, 2020 22:20 PM

Calculating of sum $\sum_{z:\:z^n = 1} \frac{1}{2+z}$ with residues

complex-analysis residue-calculus roots-of-unity
Updated June 05, 2020 22:20 PM

Multiple variable calculus optimization problem

real-analysis calculus optimization
Updated June 05, 2020 22:20 PM

Best mathematical algorithm to find an allergen in foods?

probability complex-analysis statistics
Updated June 05, 2020 21:20 PM

Mutually Singular measures

real-analysis analysis measure-theory singular-measures
Updated June 05, 2020 21:20 PM

Linear Combination of Monotonic increasing Function is Monotonic increasing.

real-analysis
Updated June 05, 2020 21:20 PM

Coercivity of a(u,v) on L2

functional-analysis partial-differential-equations numerical-methods
Updated June 05, 2020 21:20 PM

Gradient of an angle

geometry vectors vector-analysis
Updated June 05, 2020 20:20 PM

Show if $\,\alpha_n\searrow0$ the sequence $a_n:=\alpha_1-\alpha_2+\alpha_3-\alpha_4+...+(-1)^{n-1}\alpha_n$ converges.

real-analysis sequences-and-series convergence-divergence solution-verification cauchy-sequences
Updated June 05, 2020 20:20 PM

{$A°, Fr(A),(X-A)°$} is partition of metric space

real-analysis general-topology
Updated June 05, 2020 20:20 PM

geometry problem dealing with quadrilateral and proving two lines perpendicular to each other and equal in magnitude

geometry euclidean-geometry vector-analysis rotations quadrilateral
Updated June 05, 2020 20:20 PM

What is the principal value of $\ln (i)+ \ln (-i)$

complex-analysis complex-numbers logarithms
Updated June 05, 2020 19:20 PM

Prove if $\vert a_{n+1}-a_n\vert\leq \ q\vert a_n - a_{n-1} \vert$ then $(a_n)_{n\in\mathbb{N}}$ is a Cauchy sequence

real-analysis convergence-divergence proof-writing cauchy-sequences
Updated June 05, 2020 19:20 PM

An unit ball consits of infinite disjoint ball with radius $1/4$

functional-analysis
Updated June 05, 2020 19:20 PM

An interesting convex set property

real-analysis analysis convex-analysis
Updated June 05, 2020 19:20 PM

Non-exact differential equation where does not exist integrating factor dependent on x and y only

calculus ordinary-differential-equations analysis differential
Updated June 05, 2020 18:20 PM

Fourier transform of the rectangular function

fourier-analysis fourier-transform
Updated June 05, 2020 17:20 PM

$\max_i(a_i+b_1)\leq \max_i(a_i+b_i)?$

calculus sequences-and-series analysis
Updated June 05, 2020 17:20 PM

Differentiability at a point iff ...

limits analysis functions derivatives
Updated June 05, 2020 17:20 PM

How to show $\mathbb{P}(\max_{1\leq i\leq n}(X_i+Y_1)\geq t)\leq \mathbb{P}(\max_{1\leq i\leq n}(X_i+Y_i)\geq t).$

real-analysis calculus probability
Updated June 05, 2020 17:20 PM

Fourier transform of integral related to zeta function

calculus integration fourier-analysis fourier-transform multiple-integral
Updated June 05, 2020 17:20 PM

Is it possible to calculate the regression sine function given three points?

regression regression-analysis
Updated June 05, 2020 16:20 PM

checking uniform convergence of series $\sum_{n=1}^\infty x^n$

real-analysis uniform-convergence pointwise-convergence
Updated June 05, 2020 16:20 PM

Taylor Series of $\ln(1+x^3)/[\tan(x)-x]$

real-analysis
Updated June 05, 2020 15:20 PM

Order of the sum of two meromorphic functions

complex-analysis meromorphic-functions
Updated June 05, 2020 15:20 PM

Hamilton function

real-analysis ordinary-differential-equations optimization control-theory
Updated June 05, 2020 15:20 PM

Interval of Existence for initial value problem: $\dot x = x^2$, $x(0) = x_0$

real-analysis integration ordinary-differential-equations derivatives
Updated June 05, 2020 14:20 PM

What is the explanation about the difference in two derivatives of vectors?

derivatives vectors vector-analysis self-learning
Updated June 05, 2020 13:20 PM

Does the existence of the integral $\int_0^\infty f(x)dx$ imply that f(x) is bounded on $[0,\infty)$ when f(x) is continuous in this same interval?

integration functional-analysis continuity bounds-of-integration
Updated June 05, 2020 13:20 PM

Centroid - Ellipse

real-analysis calculus integration
Updated June 05, 2020 13:20 PM

Countability of the set $(0,1)$

real-analysis elementary-set-theory proof-explanation
Updated June 05, 2020 13:20 PM

What can be concluded about an operator's eigenvalue if its quadratic form takes on a negative value?

functional-analysis eigenvalues-eigenvectors operator-theory hilbert-spaces
Updated June 05, 2020 13:20 PM

Does the series $ \sum_{n=1}^{\infty} (xe^{-x})^n$ converges?

real-analysis sequences-and-series convergence-divergence
Updated June 05, 2020 13:20 PM

Why curve has Jordan measure equal $0$

real-analysis measure-theory curves
Updated June 05, 2020 12:20 PM

Operator Norm of Translation Operator

functional-analysis analysis fourier-analysis operator-theory
Updated June 05, 2020 12:20 PM

Are the Fréchet differentiable functions a closed subspace of this normed space of Lipschitz functions?

functional-analysis measure-theory lipschitz-functions frechet-derivative
Updated June 05, 2020 12:20 PM

Solving the integral $\int_{0}^{\infty} \frac{\sin{x}}{x^2+1} dx$

complex-analysis analysis definite-integrals improper-integrals
Updated June 05, 2020 11:20 AM

Find Laurent serie to f(z)=$\frac{1}{z(1-z)}$

complex-analysis laurent-series
Updated June 05, 2020 11:20 AM

Analytic function over an open disk

complex-analysis
Updated June 05, 2020 11:20 AM

Reference for "If $(a_n)$ is a sequence of real numbers with $\lim a_n^2=0$, then also $\lim a_n=0$"?

real-analysis sequences-and-series limits reference-request
Updated June 05, 2020 11:20 AM

Entire function satisfying $f(z)=f(zi)$ for all $Z\in \mathbb{C}$

complex-analysis complex-numbers entire-functions
Updated June 05, 2020 11:20 AM

A problem regarding the ratios of two functions

analysis functions functional-equations
Updated June 05, 2020 10:20 AM

Dirac comb Fourier transform

fourier-analysis fourier-series fourier-transform signal-processing dirac-delta
Updated June 05, 2020 10:20 AM

Find maximum on $[0,1]$ of $f(x) =\int_0^x \sqrt{t^4+(1-x)^2(x-t)^2} \operatorname d t$

real-analysis calculus definite-integrals maxima-minima
Updated June 05, 2020 09:20 AM

Show that, the spiral and the half straight line in $\Bbb{R}^2$ are homeomorphic.

analysis metric-spaces solution-verification
Updated June 05, 2020 09:20 AM

Convergence of summable Fourier series.

real-analysis sequences-and-series fourier-analysis fourier-series
Updated June 05, 2020 09:20 AM

Trying to prove, that $\frac{\partial f}{\partial t} (x,t) - \sum_{i=0}^{n} {\frac{\partial^2 f}{\partial^2 x_{i}}}(x,t) = 0$

analysis partial-differential-equations divergence-operator differential-operators
Updated June 05, 2020 09:20 AM

Geometric view on $f(x)=x\sin(\frac{1}{x})$

real-analysis reference-request projective-geometry
Updated June 05, 2020 08:20 AM

Showing Page 1 of 0