Given the task definition and input, reply with output. In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Context: In 1979 Hirschfeld published the first of a trilogy on Galois geometry, pegged at a level depending only on "the group theory and linear algebra taught in a first degree course, as well as a little projective geometry, and a very little algebraic geometry. Link Information: ystems of linear equations arose in Europe with the introduction in 1637 by Rene Descartes of coordinates in geometry. Answer: algebraic geometry
Of the types of math Hirschfeld in 1979 considered necessary to learn before reading his work on Galois geometry, which is the oldest mathematical discipline?