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Conventions

In this document, a vertical bar `|' is used to indicate alternate values; e.g., X|Y|Z means that the value X, Y, or Z can be used.

Coordinates are given in the order X, Y, Z and are separated by commas or blanks. For 2-D simulations, only two coordinates are required and the unused direction need not appear but may be entered for visual clarity. For 1-D simulations, only the x-coordinate is used. In cylindrical geometry, these stand for (r, z), and in spherical geometry they represent (r, Optionally, the user may use `R' in place of the symbol `X' and `TH' in place of the symbol `Y' when cylindrical or spherical geometry is being used, and `PHI' in place of `Z' in spherical geometry.

The units for length are dependent upon which system of units has been specified by the user (see section User Units). The units for rotational coordinates in cylindrical or spherical geometries are radians.

Input parameters for the simulation are governed through the input file. In this manual, input file examples and references to input keywords and the values which follow them appear in typewriter font. When the parameter values are alphanumeric symbols, they can be written either in lowercase or uppercase characters, but the keywords (identifiers) themselves are written only in lowercase. Values assigned to the parameters can be of four types:

real:
Real numbers, e.g., 1.0, .01, -0.01, +1.0e-1
integer:
Integer numbers, e.g., 1, +1, -1
flag:
Can take the values ON (or, equivalently, TRUE), and OFF (or, equivalently, FALSE)
string:
An alphanumeric string, without quotation marks, e.g., tantalum.tab

In the input examples, optional data are followed by an asterisk (*).

Keyboard input typed at command prompt is shown in this font.

The index also incorporates certain conventions. Concepts are shown in lower case. Commands are shown in the same fonts as within the document. Each index entry is followed by the section in which it is found.

We use the word "simulation" to refer to the entire process in the application of the LSP code to some physical model, whereas the word "run" usually refers to a single period of uninterupted calculation; that is, any simulation may require many runs, as determined by time restraints or processor availability on the computer system being used.


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