Hello, how to typeset differential in math correctly? Here are my attempts: ---- \definemathcommand[dif][nolop]{\mfunction{d}} % Based on http://wiki.contextgarden.net/Math/functions \starttext \startformula \sin x {\tf d} x \stopformula \startformula \sin x \dif x \stopformula \stoptext ---- But: - case 1: there is no space between "d" and "x" (should be similar to that between "sin" and "x") - case 2: "d" in the formula is shifted down (?!) somehow. So - ? Other questions: I need to typeset some math text. - Variables should be typeset slanted, which is OK (see "x" in the example). - Functions (sin, log... "d" in df/dx) should be typeset non-slanted - I guess \definemathcommand is supposed for this (or is there a better way?). - Vector variables should be typeset bold slanted - is there a special command for this? (\vec adds arrow above the expression, so it is not supposed for this). Thank you in advance. Best regards, Lukas -- Ing. Lukáš Procházka | mailto:LPr@pontex.cz Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz Bezová 1658 147 14 Praha 4 Tel: +420 241 096 751 Fax: +420 244 461 038