An algebraic variety over a field 
that becomes isomorphic
to a projective space.
Brauer-Severi Variety
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References
Hazewinkel, M. (Managing Ed.). Encyclopaedia of Mathematics: An Updated and Annotated Translation of the Soviet "Mathematical Encyclopaedia." Dordrecht, Netherlands: Reidel, pp. 480-481, 1988.Referenced on Wolfram|Alpha
Brauer-Severi VarietyCite this as:
Weisstein, Eric W. "Brauer-Severi Variety." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Brauer-SeveriVariety.html