- Ansatz
In physics and mathematics, an "ansatz" (Ger., "anset, onset"; today, "setup"; plural: Ansätze) is an educated guess that is verified later by its results. An "ansatz" is the establishment of the starting equation(s) describing a mathematical or physical problem. It can take into consideration boundary conditions. After an ansatz has been established, the equations are solved for the general function of interest. Typically, a word problem starts by writing down the "ansatz" with subsequent refinement leading to the solution of the problem.
For example, given a
set of experimental data that looks to becluster ed about a line, a linear ansatz could be made to find theparameter s of the line by aleast squares curve fit.Variational approximation methods use ansätze and then fit the parameters.Another example could be the mass, energy, and entropy balance equations that, considered simultaneous for purposes of the elementary operations of linear algebra, are the "ansatz" to most basic problems of thermodynamics.
Another example of ansatz is to suppose the solutions of a homogeneous linear
differential equation anddifference equation to have, respectively, exponential and power form. More generally one can guess a particular solution of a system of equations and test such an ansatz by direct substitution of the solution in the system of equations.ee also
*
Ersatz
*Guesstimate Reference
* [http://mathworld.wolfram.com/Ansatz.html Wolfram article]
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