RT Journal Article SR Electronic A1 MARKECHOVÁ, Iveta T1 A NOTELET TO CLICHÉ-CLAIM ON MATHEMATICAL TRANSPARENCY JF Trends in education YR 2010 VO 3 IS 1 SP 164 OP 167 UL https://tvv-journal.upol.cz/en/artkey/tvv-201001-0037.php AB The article presents a simple classroom example concerning the obligatory question how to make explaining the conception of the definite integral more transparent for technical university students. The explanation takes into account such mathematical fields as mathematical analysis, analytic geometry, linear algebra, as well as computer geometry.