formulation 2a of linecircle, could be any other

.gitignore

@@ -182,3 +182,5 @@ scripts/synthdata/results-synth/
 tests/Fastor/
 original
 tutorial/startSys
+tutorial/HxH.cxx
+tutorial/HxHt.cxx

cmd/minus-linecircle.cxx

@@ -9,7 +9,7 @@
 #include <chrono>
 #include <thread>
 #include <minus/minus.h>
-#include <minus/chicago14a-io.h>
+#include <minus/linecircle-io.h>
 #include <minus/chicago-default.h>
 
 using namespace MiNuS;

minus/minus.h

@@ -27,11 +27,12 @@ using C = typename std::complex<F>;
 
 // The problem solvers that this solver template currently supports
 enum problem {chicago14a, chicago6a, cleveland14a, phoenix10a /*, standard*/};
+enum problem {chicago14a, chicago6a, cleveland14a, phoenix10a, linecircle2a /*, standard*/};
 
 // The current best formulations for each problem
 constexpr problem chicago = problem::chicago14a;
 constexpr problem cleveland = problem::cleveland14a;
-constexpr problem linecircle = problem::linecircle;
+constexpr problem linecircle = problem::linecircle2a;
 // You can now use solver<chicago> to default to the best formulation
 
 // Each problem specializes this in their specific .h