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Welcome to the Physics Derivation Graph

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scalar (Rank 0): Single values. Includes constants (e.g., pi, e, 42) and variables (e.g., x, y, c)
vector (Rank 1): Ordered lists of scalars (1xn or nx1)
matrix (Rank 2): Grids of scalars (mxn)
relation, e.g., =, >, <, <=, >=, \propto
operation, e.g.,

arithmetic: +, -, multiply, divide, mod
Unary Operators: factorial, negation, square root, bar (mean)
Linear Algebra Operators: Transpose, Determinant, Trace
Calculus/Differential Operators: differential, nabla/del, laplacian
Integrals
Iterative Operators: Operations over a range (product, sum)
Set operations, e.g., "is member of"