div.proves {text-align:center;margin-left:auto;margin-right:auto;font-size:130%;margin-top:15px;color:navy;width:70%;min-width:900px;background-image:url("../gifs/math.gif");}
table.proves_tab caption {margin-top:10px; margin-bottom:10px; font-family:Arial; font-style:italic; font-weight:bold; font-size:140%;}
table.proves_tab {font-size:90%; margin-top:10px;margin-left:auto;margin-right:auto;}
table.proves_tab td {padding:0 10px 0 10px; text-align:center;line-height:180%;border:0px solid black}
table.proves_tab a {text-decoration:none;color:navy;}
table.proves_tab a:hover {font-style:italic;}
table.proves_tab a:visited {color:navy;}