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What does the semicolon mean in the notation for a function like G(r1, r2; z) ?
In what context is this ? Can you link to the original source ?
The "G(r1, r2 ; z)" notation represents a function, where r1 and r2 are variables and z is a parameter. This notation is commonly used in mathematics and physics to denote a function with multiple variables and parameters.
The variables, r1 and r2, represent the independent variables of the function, while the parameter, z, represents a constant or dependent variable. The specific interpretation of these variables and parameters will depend on the context in which the notation is being used.
One example of a function represented by "G(r1, r2 ; z)" is the Green's function, which is used to solve differential equations in physics. In this context, r1 and r2 could represent the positions of two particles, while z represents a parameter such as time or energy.
The "G(r1, r2 ; z)" notation is different from other notations for functions in that it explicitly shows the variables and parameters of the function. Other notations, such as f(x) or y = mx + b, may not indicate the specific variables and parameters being used in the function.
Using "G(r1, r2 ; z)" notation can make it easier to understand and manipulate functions with multiple variables and parameters. It also allows for consistency and clarity when communicating mathematical concepts and equations.