ISO 31-11#Sets

{{Short description|Vector and tensor}}

{{Use British (Oxford) English|date=January 2012}}

ISO 31-11:1992 was the part of international standard ISO 31 that defines mathematical signs and symbols for use in physical sciences and technology. It was superseded in 2009 by ISO 80000-2:2009 and subsequently revised in 2019 as ISO-80000-2:2019.{{cite web|title=ISO 80000-2:2019|date= 19 May 2020 |url= https://www.iso.org/standard/64973.html |publisher=International Organization for Standardization|access-date=4 Oct 2021}}

It included definitions for symbols for mathematical logic, set theory, arithmetic and complex numbers, functions and special functions and values, matrices, vectors, and tensors, coordinate systems, and miscellaneous mathematical relations.

{{cite book

| first1 = Ambler | last1 = Thompson

| first2 = Barry M | last2 = Taylor

| url = http://physics.nist.gov/cuu/pdf/sp811.pdf

| title = Guide for the Use of the International System of Units (SI) — NIST Special Publication 811, 2008 Edition — Second Printing

|date=March 2008

| publisher = NIST

| location = Gaithersburg, MD, USA

}}