+ quality criterion for mesh elements reveals the degree of conformity of \r
+ a mesh element to the regular element of its type (with all edges having \r
+ the same length). The \r
+ criterion can be defined as </p>\r
+\r
+<p class="whs2"><img src="../image142.gif" width="120px" height="56px" border="0" class="img_whs3">where <span style="font-weight: bold; font-style: italic;"><I><B>К</B></I></span> \r
+ is the considered element of the mesh, <span style="font-weight: bold; font-style: italic;"><I><B>h</B></I></span><span \r
+ style="vertical-align: Sub;\r
+ font-weight: bold;\r
+ font-style: italic;"><I><B>max</B></I></span> is the diameter of the element \r
+ К (i.e. the length of the longest edge), <span style="font-weight: bold; font-style: italic;"><I><B>р</B></I></span><span \r
+ style="vertical-align: Sub;\r
+ font-weight: bold;\r
+ font-style: italic;"><I><B>к</B></I></span> is the radius of the sphere \r
+ inscribed in the element K, and <span style="font-weight: bold; font-style: italic;"><I><B>a</B></I></span> \r
+ is a normalisation value chosen so that <span style="font-weight: bold; font-style: italic;"><I><B>Q</B></I></span><span \r
+ style="vertical-align: Sub;\r
+ font-weight: bold;\r
+ font-style: italic;"><I><B>K</B></I></span> = 1 when К is an equilateral \r
+ simplex. </p>\r
+\r
+<p class="whs2"> </p>\r
+\r
+<p>The value of <span style="font-weight: bold; font-style: italic;"><I><B>Q</B></I></span><span \r
+ style="vertical-align: Sub;\r
+ font-weight: bold;\r
+ font-style: italic;"><I><B>K</B></I></span> varies between 1 and +oo and the \r
+ closer it is to 1, the better the element К is. </p>\r
+\r
+<ul type="disc" class="whs4">\r