On 16-Mar-2014 19:38:25 Ralph Corderoy wrote: > Hi Ted, > >> The values I chose for the constants in the expression were motivated >> by aiming for a reduction by 1/cuberoot(2) as one moves up one level >> of superscript, so that the point size of "z" in "$X sup V sup 2 sup >> z$" would be about half that of X: cuberoot(2) = 1.26, 14/11 = 1.27 -- >> but only using small multipliers (since ".ps (u;\\n[.ps]*11+7/14>?5)" >> is set to work in "u", which for PS is points*1000, so 11-point is >> 11000u; and you could easily provoke overflow). > > Is this a solution? > > $ python -c 'print 2 ** (-1 / 3.0)' > 0.793700525984 > $ > $ cat ted > .ps 12p > .tm \n[.ps] > .ps > (u;(\n[.ps]*7/10)+(\n[.ps]*9/100)+(\n[.ps]*3/1000)+(\n[.ps]*7/10000)>?5z) > .tm \n[.ps] > .ps > (u;(\n[.ps]*7/10)+(\n[.ps]*9/100)+(\n[.ps]*3/1000)+(\n[.ps]*7/10000)>?5z) > .tm \n[.ps] > .ps > (u;(\n[.ps]*7/10)+(\n[.ps]*9/100)+(\n[.ps]*3/1000)+(\n[.ps]*7/10000)>?5z) > .tm \n[.ps] > .ps > (u;(\n[.ps]*7/10)+(\n[.ps]*9/100)+(\n[.ps]*3/1000)+(\n[.ps]*7/10000)>?5z) > .tm \n[.ps] > .ps > (u;(\n[.ps]*7/10)+(\n[.ps]*9/100)+(\n[.ps]*3/1000)+(\n[.ps]*7/10000)>?5z) > .tm \n[.ps] > $ > $ troff ted > 12000 > 9524 > 7557 > 5996 > 5000 > 5000 > $ > > Cheers, Ralph.
A nice solution, Ralph! (Posted while I was still writing my previous post, so I have only just now seen it). And you seem to have hit on the solution to the ">?5" puzzle with your ">?5z"! But (see my previous post) 'eqn' does not put the "z" in, so I think between us we have uncovered a deficiency in 'eqn'. Quite where in the 'eqn' code this lurks is not obvious (to me at the moment). Or maybe, as you suggest, it is only there because of the "/10" and 'eqn' has no intention of setting a lower limit to point-size in superscripts (though I think that could be a flaw in itself, from the typesetting point of view). Best wishes, Ted. ------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@wlandres.net> Date: 16-Mar-2014 Time: 20:49:46 This message was sent by XFMail -------------------------------------------------
