/usr/share/doc/freefem++/examples/examples++-eigen/ is in freefem++-doc 3.19.1-1.
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/usr/share/doc/freefem++/examples/examples++-eigen/BeamEigenValue.edp
/usr/share/doc/freefem++/examples/examples++-eigen/BeamEigenValueperio.edp
/usr/share/doc/freefem++/examples/examples++-eigen/Lap3dEigenValue.edp
/usr/share/doc/freefem++/examples/examples++-eigen/LapComplexEigenValue.edp
/usr/share/doc/freefem++/examples/examples++-eigen/LapEigenValue.edp
/usr/share/doc/freefem++/examples/examples++-eigen/LapnosymEigenValue.edp
/usr/share/doc/freefem++/examples/examples++-eigen/Stokes-eigen.edp
/usr/share/doc/freefem++/examples/examples++-eigen/VP-Steklov-Poincare.edp
/usr/share/doc/freefem++/examples/examples++-eigen/all.edp
/usr/share/doc/freefem++/examples/examples++-eigen/neuman.edp
/usr/share/doc/freefem++/examples/examples++-eigen/regtests.edp
/usr/share/doc/freefem++/examples/examples++-eigen/testeigen.edp