Expressions
Parameters, variables, numbers and dimensions are combined to create
expressions, which can then be used in the objective and
constraints.
You can use addition, subtraction, negation, multiplication, transpose, and
scalar parameter division. You can also combine these operations with various
functions.
Examples, assuming previously defined symbols and valid dimensions:
 A*x + b
matrixvector multiplication and vector addition
 x
negation
 p'*x
transpose and multiplication
 (p + z)'*x
parentheses, transpose and multiplication
 p'*x[1]
accessing an indexed variable, if previously
defined (equivalent to )
 (1/a)*A*z
scalar division (a must be a scalar parameter or a dimension)
 z[1] + z[3]
accessing the first and third elements of a vector (equivalent
to )
 x[3][1]
accessing the first element of an indexed variable
(equivalent to )
Notes
Be cautious when indexing variables or parameters; the same syntax is used
both for accessing indexed variables or parameters,
and for accessing the elements of parameters or variables. In general, mirror
the relevant mathematics in your problem statement, and check
the output provided by CVXGEN to ensure you are getting
what you want.
You cannot place a vector, or a scalar optimization variable, in the
denominator of a scalar ratio.
Operation order mirrors mathematics. Note: ‘/’ binds more tightly than any other
operator, so 1/2*a means (1/2)*a. Check CVXGEN's output
if unsure.
