Thread 'How to define route if we only know velocity (with no popular formulation)?' Hi there! I invented the condition and I try to resolve it: Allow we only know velocity of transferring particle: ##v(t)## from ##t=a## to ##t=b##. The scale of a box could fluctuate, from your incredibly smallest https://gabletoppak.com/kerala-get-ready-to-say-no-to-plastic-from-october-2/