70 outlook, notes

    mathematic modelling of extinction avoidance
        numerical calculation
            : see bin/P
            : see bin/P-precise
        rendering of mathematic expressions, test of
            > (f=20_lemma.brec; test-image ~/work/ethics/$f && google-chrome-stable /tmp/wayic.Web.imager_mike/mould/$f.xht)
        series, terminology
            • expanded form
                : see e.g. https://en.wikipedia.org/wiki/Geometric_series
            • closed form
                : see https://en.wikipedia.org/wiki/Closed-form_expression
                : see e.g. https://en.wikipedia.org/wiki/Geometric_series#Formulation
            • generator form
                : see e.g. https://en.wikipedia.org/wiki/Geometric_series