Inverse Normal equation binary file (NORMINV)

The terms of the inverse normal equations are stored in a direct access binary file.

The proneqs file has a record for each inverse normal equation column indicating the record number (heresi record terms) where the column is stored in the Norminv file

The direct access file is divided into 2 areas. The first area has 1 record for each HERESI record of the normal equations. The normal equations are divided into a number of records determined by an optiminal size determined by the overall size of the normal equations as well as an optiminal record size for processing.The second part of the file contains blocks of the actual inverse normal equation terms.

1. Heresi record terms
   • First column number
   • Number of columns
   • Number of normal equation terms
   • State of the normal euations
     • Undefined[0]
     • Normal equations[1]
     • Reduced normal equations[2]
     • Inverse normal equations[3]
   • Index to the first block of normal equations
   • Pointer to the first term of a column(number of columns)
2. Normal equations terms(number of terms)(Stored as a number of blocks)