vcpu

From what I understand so far, a vCPU is a CPU that you can assign more virtual cores than physical cores, so they act sort of like threads. Whereas, I don't fully understand what vGPUs are. I believe they just divide up GPU cores for VMs. So am I correct or not? And can someone tell me what the...

Many vCPUs are used as multiple vCPU (e.g. 2 vCPU) to 1 core (almost as a sort of hyperthreading). But what would happen if it were the other way around so you had multiple cores (e.g. 2 cores) to 1 vCPU? Don't question as to why, I would just like to know if it would work. Thanks, Joshua123033