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New posts in periodic-functions
Different way to show $\int_{-\infty}^{\infty}e^{-\frac{\cosh^2(u)}{2x}}\,e^{-\frac{u^2}{2 t}}\,\cos\left(\frac{\pi\,u}{2t }\right)\,\cosh(u)\,du > 0$
definite-integrals
periodic-functions
Algebraic Curves and Second Order Differential Equations
ordinary-differential-equations
algebraic-geometry
algebraic-curves
periodic-functions
Is there a definition of a "pseudo period" for $f(x)=\sin(3x)+\sin(\pi x)$?
trigonometry
irrational-numbers
rational-numbers
periodic-functions
quasiperiodic-function
Period of $f(2x+3)+f(2x+7)=2$
periodic-functions
Finding the period of a nonlinear ODE
ordinary-differential-equations
fourier-analysis
dynamical-systems
nonlinear-system
periodic-functions
Must a continuous and periodic functions have a smallest period?
real-analysis
continuity
periodic-functions
Floquet Theory - Reducing ODE's to Constant Coefficient ODE's?
ordinary-differential-equations
periodic-functions
Sturm Liouville with periodic boundary conditions
ordinary-differential-equations
periodic-functions
eigenfunctions
Is the sum of two sine waves periodic? [closed]
trigonometry
periodic-functions
Function with arbitrary small period
periodic-functions
Reversing the process of taking the "sine of an arbitrary shape"
periodic-functions
Do full rank matrices in $\mathbb Z^{d\times d}$ preserve integrals of functions on the torus?
integration
group-theory
linear-transformations
periodic-functions
ergodic-theory
Periodicity of a Function Given the Functional Equation $f(x+a)=\frac12+\sqrt{f(x)-\big(f(x)\big)^2}$ [closed]
functions
functional-equations
periodic-functions
What determines if a function has a least positive period?
real-analysis
periodic-functions
Let $f: \mathbb{R} \to \mathbb{R}$ be continuous periodic function with period $T>0$
real-analysis
continuity
periodic-functions
Let $f$ be a bounded, continuous function such that $f(t+17) = f(t)$ for all $t$
integration
functions
continuity
periodic-functions
Given $f(x+T) = f(x) + a$, prove that $f(x) = \varphi(x) + {a \over T}x$, where $\varphi(x)$ is periodic with period $T$
algebra-precalculus
proof-verification
periodic-functions
Periodic function implies periodic primitive?
integration
periodic-functions
Periodic polynomial?
functional-analysis
functions
polynomials
periodic-functions
Is the condition sufficient?
real-analysis
integration
periodic-functions
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