Thread 'How to find route if we only know velocity (without having common formulation)?' Hi there! I invented the condition and I try to resolve it: Let we only know velocity of transferring particle: ##v(t)## from ##t=a## to ##t=b##. That is supported by a very well-trained product sales and repair https://gabletoppak.com/why-gable-top-cartons-are-making-a-splash-in-the-water-industry/