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Algebraic expressions - Edexcel

In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...
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Grassmann-Cayley Algebra for Modelling Systems of Cameras and the Algebraic Equations of the Manifold of Trifocal Tensors [and Discussion]

We show how to use the Grassmann-Cayley algebra to model systems of one, two and three cameras. We start with a brief introduction of the Grassmann-Cayley or double algebra and proceed to demonstrate ...
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Algebraic expressions - Eduqas

In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known (unknowns). A term is a combination of letters and/or numbers, often multiplied together, ...