Numerical Calculations in Clifford Algebra

26Interfaces

This chapter contains a list of the application programmer interfaces (APIs) organised in terms of function, with cross references to the pages in Chapter 27 where the full descriptions are given. For short descriptions, see the quick reference Section 27.5.

26.1 Configuration and Observation

These interfaces do not change the values of any numerical entities. They are used to control the effect of and display the result of other operations.

26.1.1 Management

It is necessary to establish the numerical context for calculation before any can occur. This includes reserving some memory, declaring the number of dimensions, and declaring the signature for each dimension.

Before anything else is attempted, the sub‐routines recovery_level(), create_cliffmem(), and declare_primal() should be invoked in that order. These do not have default values. The sub‐routine pack_signature() can be used to make it easier to set up uniform signatures. For mixed signatures, the array ‘lambda[n]’ needs to be initialised in some other manner. It is also appropriate to establish the printing format using format_printing() early, although the printing format does have a default, set from within create_cliffmem().

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void create_cliffmem(int n);	337
void free_cliffmem(int p);	345
void get_mem_usage(int n[2][3]);	349
int *pack_signature(int n, int *lambda, int sig);	396
void declare_primal(int n, int *lambda);	339
int access_primal(int **lambda);	316

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int ...