Mathematical publications do not age to the same extent as publications in other sciences. So it is desirable to keep older publications on-site as much as possible. But the emphasis is on the collection of current materials. A number of publishers have active reprint programs for materials in mathematics if retrospective materials are needed. The Mathematics materials budget provides the funds for the acquisition of mathematics-related material.
The emphasis is on English language materials, but foreign language materials, particularly French and German, are also collected. Russian and Chinese publications are often available in translation and some of these are collected.
U.S., Canadian, and European materials tend to be emphasized but there are no restrictions.
Print materials are complemented by electronic resources such as abstract & indexing sevices (e.g., MathSciNet), electronic journals, electronic books, select databases, and a small collection of mathematics-related videos. Some mathematics/statistics software packages are also purchased.
Emphasis is on current imprints, but retrospective collection development is done as necessary.
Deselection applies, but is not limited, to outdated text-books, duplicate copies, superceeded reference material, and works in poor condition.