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2. Pattern Blocks - Wikipedia

   en.wikipedia.org/wiki/Pattern_blocks

   Pattern blocks were developed, along with a Teacher's Guide to their use, [1] at the Education Development Center in Newton, Massachusetts as part of the Elementary Science Study (ESS) project. [5] The first Trial Edition of the Teacher's Guide states: "Work on Pattern Blocks was begun by Edward Prenowitz in 1963.

3. Mathematics and fiber arts - Wikipedia

   en.wikipedia.org/wiki/Mathematics_and_fiber_arts

   Ada Dietz (1882 – 1981) was an American weaver best known for her 1949 monograph Algebraic Expressions in Handwoven Textiles, which defines weaving patterns based on the expansion of multivariate polynomials. [9] J. C. P. Miller used the Rule 90 cellular automaton to design tapestries depicting both trees and abstract patterns of triangles. [10]

4. Geometric algebra - Wikipedia

   en.wikipedia.org/wiki/Geometric_algebra

   A multivector that is the exterior product of linearly independent vectors is called a blade, and is said to be of grade ⁠ ⁠. [f] A multivector that is the sum of blades of grade is called a (homogeneous) multivector of grade ⁠ ⁠. From the axioms, with closure, every multivector of the geometric algebra is a sum of blades.