Reunaarvoksi

Reunaarvoksi is a Finnish term used in mathematics and related language to denote the phrase “as a boundary value.” The form is built from reuna (boundary, edge) and arvo (value) with the suffix -ksi, which in Finnish marks a role or function, similar to “as” in English. In mathematical contexts, reunaarvoksi refers to a value that is specified on the boundary of a domain rather than in its interior.

Etymology and morphology: The word combines reuna + arvo + -ksi. The -ksi suffix signals a role or function, so reunaarvoksi literally means “as a boundary value.” It is primarily found in Finnish-language mathematical texts and discussions of boundary conditions, and it can appear in explanations of how a boundary value enters a problem or its solution.

Usage: In boundary value problems for ordinary or partial differential equations, authors may describe a condition as being set reunaarvoksi to a particular value. For example, a Finnish sentence could express that a given value is imposed as the boundary value for the solution on the domain boundary. In introductory explanations, the phrase helps distinguish boundary values from values defined inside the domain, highlighting their role in determining solutions.

See also: boundary value problem, boundary condition, Finnish mathematical terminology.