👉 Underlaying in the context of mathematics and physics refers to a mathematical or physical system that is derived from or underlies another system. It can be seen as an extension or extension of the original system, but without changing its fundamental characteristics. For example, if we have two different systems A and B, with A being the primary system and B being an extension of it, then A may include additional properties that are not present in B. For instance, a system A might include a property of
