rK

rk is a two-letter sequence that functions as an abbreviation, acronym, or symbol in many domains, and there is no single universal definition. Its meaning is determined by context.

In mathematics and linear algebra, rk commonly denotes the rank of a matrix or linear transformation. The rank measures the dimension of the vector space spanned by a matrix’s rows or columns and is a fundamental descriptor of a system’s solvability and independence. Textbooks often use rk(A) or simply rk to refer to the rank of A.

In computer science, RK frequently stands for the Rabin–Karp string-search algorithm, a method for finding patterns within text using hashing to achieve efficient average-case performance. The initials may also appear as a variable or shorthand in code, where rk could stand for rank or related concepts depending on the program.

In linguistics and phonology, rk can appear as a consonant cluster in transcriptions or orthography, representing the sequence of sounds produced by adjacent letters in a language.

As an acronym or code, RK is used by various organizations, projects, or place names. Because it is a common two-letter code, its exact meaning should be inferred from surrounding text or clarified by explicit definition.

Overall, rk serves as a versatile symbol across disciplines, with the most established meanings being mathematical rank and the Rabin–Karp algorithm, while other uses arise from contextual abbreviations and naming conventions.