The symbols Δt and ΔT (spoken as "delta T") are commonly used in a variety of contexts. ΔT (timekeeping) the difference between two time scales, Universal...

In precise timekeeping, ΔT (Delta T, delta-T, deltaT, or DT) is a measure of the cumulative effect of the departure of the Earth's rotation period from...

Y(t)} is the current system state and Y(t+Δt){\displaystyle Y(t+\Delta t)} is the state at the later time (Δt{\displaystyle \Delta t} is a small time step)...

x(t±Δt){\displaystyle \mathbf {x} (t\pm \Delta t)} in different time directions: x(t+Δt)=x(t)+v(t)Δt+a(t)Δt22+b(t)Δt36+O(Δt4)x(t−Δt)=x(t)−v(t)Δt...

period between the ticks of the clock Δt{\displaystyle \Delta t} is equal to 2L divided by the speed of light c: Δt=2Lc{\displaystyle \Delta t={\frac {2L}{c}}}...

integrals, make a change of variables from z to ΔT: Q=UAr∫ΔT(A)ΔT(B)ΔTdzdΔTd(ΔT)∫ΔT(A)ΔT(B)dzdΔTd(ΔT){\displaystyle Q={\frac {UAr\displaystyle \int _{\Delta...

{\ce {N\to \infty }}} of the following formula, ∑i=1N|f(ti)−f(ti−1)Δt|Δt−∑i=1N|f′(ti)|Δt.{\displaystyle \sum _{i=1}^{N}\left|{\frac {f(t_{i})-f(t_{i-1})}{\Delta...

stable for oscillatory motion, as long as the time-step Δt{\displaystyle \Delta t} is constant, and Δt≤2/ω{\displaystyle \Delta t\leq 2/\omega }. Using Yoshida...

standard configuration: c2Δt2−Δx2=c2γ2(Δt′+vΔx′c2)2−γ2 (Δx′+vΔt′)2=γ2(c2Δt′2+2vΔx′Δt′+v2Δx′2c2)−γ2 (Δx′2+2vΔx′Δt′+v2Δt′2)=γ2c2Δt′2−γ2v2Δt′2−γ2Δx′2+γ2v...

as a rate, f = N/Δt, involving the number of entities counted or the number of events happened (N) during a given time duration (Δt);[citation needed]...

discrete form: t=nΔt,f=mΔf,τ=pΔt{\displaystyle t=n\Delta _{t},f=m\Delta _{f},\tau =p\Delta _{t}} X(nΔt,mΔf)=∑−∞∞w((n−p)Δt)x(pΔt)e−j2πpmΔtΔfΔt{\displaystyle...

where: Δt{\displaystyle \Delta t} is a period of time Δmbody{\displaystyle \Delta m_{\text{body}}} the change in mass of the toxin in the body during Δt{\displaystyle...

limiting value of the average power as the time interval Δt approaches zero. P=limΔt→0Pavg=limΔt→0ΔWΔt=dWdt.{\displaystyle P=\lim _{\Delta t\to 0}P_{\mathrm...

infinitesimal time step δt{\displaystyle \delta t}, we see that each particle phase space location changes as {qi′=qi+qi˙δt,pi′=pi+pi˙δt,{\displaystyle...

is lower than that of the pure solvent, and the freezing-point depression (ΔT) is directly proportional to the amount concentration for dilute solutions...

the distance between subsequent points on the curve, is Δsi=|r(ti+Δt)−r(ti)|≈|r′(ti)Δt|{\displaystyle \Delta s_{i}=\left|\mathbf {r} (t_{i}+\Delta t)-\mathbf...

Q{\displaystyle Q} is the net heat (energy) transfer, Δt{\displaystyle \Delta t} is the time taken, ΔT{\displaystyle \Delta T} is the difference in temperature...

ρ{\displaystyle \mathrm {\rho } }, given constant pressure, can be rewritten as ρ=ρ0(1−βΔT){\displaystyle \rho =\rho _{0}(1-\beta \Delta T)} where: ρ0{\displaystyle...

time, we may define ΔT(t)=T(t)−Tenv{\displaystyle \Delta T(t)=T(t)-T_{\text{env}}}. The equation becomes dT(t)dt=dΔT(t)dt=−1τΔT(t).{\displaystyle {\frac...

distinction that is now made between EOT, E, and Δt the latter was known as the equation of time) is Δt=Λ−α{\displaystyle \Delta t=\Lambda -\alpha } here...

u_{j}^{n}=u(x_{j},t^{n})} We can discretize the heat equation as where r=αΔt(Δx)2{\displaystyle r={\frac {\alpha \,\Delta t}{\left(\Delta x\right)^{2}}}}...

\Delta s}, divided by the duration of the period, Δt{\displaystyle \Delta t}, given mathematically as v¯=ΔsΔt.{\displaystyle {\bar {v}}={\frac {\Delta s}{\Delta...

mean: ΔT (timekeeping), the time difference between Universal Time and Terrestrial Time. Delta timing, a technique used in graphics programming. ΔT (disambiguation)...

Celsius, the formula is {ΔT}°F = 9/5{ΔT}°C. To convert a delta temperature from Celsius to Kelvin, it is 1:1 ({ΔT}°C = {ΔT}K). Outline of metrology and...

A=H1−1H0{\displaystyle A=H_{1}^{-1}H_{0}}, and H1=[M+γΔtCγΔtKβΔt2CM+βΔt2K]H0=[M−(1−γ)ΔtC−(1−γ)ΔtK−(12−β)Δt2C+ΔtMM−(12−β)Δt2K]{\displaystyle...

t\mathbf {p} _{n}\left(t+{\dfrac {\Delta t}{2}}\right)} pn(t+Δt)=pn(t+Δt2)−Δt2∇U(x)|x=xn(t+Δt){\displaystyle \mathbf {p} _{n}(t+\Delta t)=\mathbf {p} _{n}\left(t+{\dfrac...

Rearranging terms gives the recurrence relation yi=xi(ΔTRC+ΔT)⏞Input contribution+yi−1(RCRC+ΔT)⏞Inertia from previous output.{\displaystyle y_{i}=\overbrace...

_{\text{e}}(\Delta t)=0} for Δt<0{\displaystyle \Delta t<0}. An instantaneous response corresponds to Dirac delta function susceptibility χe(Δt)=χeδ(Δt){\displaystyle...

backward difference again gives, u(tk)−u(tk−1)Δt=Kpe(tk)−e(tk−1)Δt+Kie(tk)+Kde(tk)−e(tk−1)Δt−e(tk−1)−e(tk−2)ΔtΔt{\displaystyle {\frac {u(t_{k})-u(t_{k-1})}{\Delta...

interval [0, T] into N equal subintervals of width Δt>0{\displaystyle \Delta t>0}: 0=τ0<τ1<⋯<τN=T and Δt=T/N;{\displaystyle 0=\tau _{0}<\tau _{1}<\cdots...