'infinitesimal change' is correct and usable in written English.
You could use this phrase to refer to an extremely minor alteration or adjustment, which usually makes little to no difference. For example, "We had to make an infinitesimal change to the recipe in order to make it gluten-free."
Descartes's rules of impact, however, would have an infinitesimal change in input — a change from B's being infinitesimally bigger than C, to C's being equal in size to B — result in a leap of output — from C rebounding while B remains stationary, to both B and C rebounding.
But just as a new parent notices every infinitesimal change in a growing infant — Has she rolled over on that side before?
Those "dv", "dx" and "dt" mean an infinitesimal change in speed (v), distance (x) or time (t), and the "/" means take the ratio.
An ideal flicker-free evolution could be achieved with infinitesimal change of Δk, but it would then take infinite time to transport atoms.
A process for which ΔS = 0 is reversible because an infinitesimal change would be sufficient to make the heat engine run backward as a refrigerator.
The infinitesimal change in entropy of a system (dS) is calculated by measuring how much heat has entered a closed system (δQ) divided by the common temperature (T) at the point where the heat transfer took place.
A reversible process can be altered in direction by infinitesimal changes in the external conditions (see Van Ness, Chapter 2).
In what follows, it will often be necessary to consider infinitesimal changes in the parameters specifying the state of a system.
Repeat pass Interferometry is applied to the study area that accounts for infinitesimal changes in the topographic elevations.
By rigging an abandoned indoor tower to capture infinitesimal changes in the wavelength of rays emitted by radioactive iron, Professor Pound and Dr. Rebka measured the effect of gravity on light.
We have applied perturbation theory to study the effects of infinitesimal changes on the material balance analysis of the unit operation.
