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DSA · Theory

Strassen's Matrix Multiplication

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Theory

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Strassen's Matrix Multiplication

Strassen's Matrix Multiplication is a DSA topic. In plain words you use it for a short Strassen's Matrix Multiplication example in a short dry-run on paper. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Strassen's Matrix Multiplication example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Strassen's Matrix Multiplication.

From the example next to this theory: Strassen's Matrix Multiplication — arrays give O(1) index access; matrices are arrays of arrays.

Trap — only saying “Strassen's Matrix Multiplication” with no example. Fix that before you talk about advanced DSA.

Viva: what is Strassen's Matrix Multiplication? Then show the smallest Strassen's Matrix Multiplication example you can type. Then name the trap.

Exam tip

What is Strassen's Matrix Multiplication? Show this: the smallest Strassen's Matrix Multiplication example you can type. Trap: only saying “Strassen's Matrix Multiplication” with no example.

Example

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Strassen's Matrix Multiplication — arrays give O(1) index access; matrices are arrays of arrays.

Short notes

  • DefStrassen's Matrix Multiplication — a short Strassen's Matrix Multiplication example in a short dry-run on paper.
  • Rulethe smallest Strassen's Matrix Multiplication example you can type
  • Traponly saying “Strassen's Matrix Multiplication” with no example
  • Usea short dry-run on paper

Questions

1

What is Strassen's Matrix Multiplication?

2

Give one small example of Strassen's Matrix Multiplication.

3

What mistake do beginners make with Strassen's Matrix Multiplication?

4

Where do you use Strassen's Matrix Multiplication?

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