Thread 'How to define route if we only know velocity (with out typical formulation)?' Hello there! I invented the issue and I try out to resolve it: Allow we only know velocity of transferring particle: ##v(t)## from ##t=a## to ##t=b##. There appears to be no way of simplifying or rearranging https://gabletoppak.com/what-makes-gabletop-pak-cartons-a-better-choice-than-plastic-bottles/