👉 Fibrosity is a concept in mathematics, specifically in functional analysis and operator theory. It refers to the degree of homogeneity or "finiteness" of an infinite-dimensional Banach space. In mathematical terms, it can be defined as follows: Given a nonempty set E of elements from a Banach space X (such as R^n), we say that E is fibrosive if for every continuous linear functional f on X, there exists some compact subset K of E such that