**News**

19 Jul. 13:

Picos1.0.0Released

Major Release with following changes:

- Semidefinite Programming Interface for MOSEK 7.0 !!!
- New options
handleBarVarsandhandleConeVarsto customize how SOCP and SDPs are passed to MOSEK (When these options are set toTrue, PICOS tries to minimize the number of variables of the MOSEK instance, see the doc inset_all_options_to_default()).- The function
dualize()returns the Lagrangian dual of a Problem.- The option
solve_via_dual(documented inset_all_options_to_default()) allows the user to pass the dual of a problem to a solver, instead of the primal problem itself. This can yield important speed-up for certain problems.- In addition to the geometric mean function
picos.geomean(), it is now possible to pass rational powers of affine expressions (through an overload of the**operator), trace of matrix powers withpicos.tracepow(), (generalized) p-norms withpicos.norm(), and nth root of a determinant withpicos.detrootn(). These functions automatically reformulate the entered inequalities as a set of equivalent SOCP or SDP constraints.- It is now possible to specify variable bounds directly (rather than adding constraints of the type
x >= 0). This can be done with the Keywordslowerandupperof the functionadd_variable(), or by the methodsset_lower(),set_upper(),set_sparse_lower(), andset_sparse_upper()of the classVariable.- It is now more efficient to update a Problem and resolve it. This is done thanks to the attribute
passedof the classesConstraintandVariable, that stores which solvers are already aware of a constraint / variable. There is also an attributeobj_passedof the classProblem, that lists the solver instances where the objective function has already been passed. The optiononlyChangeObjectivehas been deprecated.Former changes are listed

here.

**PICOS Documentation contents**

Welcome to the documentation of PICOS.
The latest version can be downloaded *here*,
and can be installed by following *these instructions*.
This documentation contains a *tutorial* and some *examples*,
which should already be enough for a quick start with PICOS. To go deeper,
have a look at the *picos reference*, which provides information
on every function of PICOS.