Title: Необов'язково

Text: Linear graphs are used in mathematics to model many real-life phenomena. A finite linear graph G is a Hausdorff space that is written as the union of finitely many arcs, each pair of which intersect in at most a common end point. The arcs are called the edges of the graph, and the end points of the arcs are called the vertices of the graph. Кожен абзац буде тестом.

Save test: Використовуйте це, якщо ви хочете поділитися цим тестом на друкування (тільки для автентифікованих користувачів).