.date{
    color:#666666;
}

img{
    display: block;
    margin-left:auto;
    margin-right:auto;
}


.ccc{
    color:#666666;
}

pre{
    padding-left:3em;
    background:#CCC;
}

.pre{
    font-family: "Courier New", monospace;
    display:block;
    type:text/plain;
    white-space: pre;
    padding-left:3em;
    background:#CCC;
}

.ccbysa{
    background-color:#2B547E;
    color:white;
    padding:1mm;
}

.content{
    padding-left:10%;
    padding-right:10%;
}

a{
    color:#2B547E;
}

a:hover {
  color:#2A7D54;
}

/* selected link */
a:active {
  color: yellow;
}

a:visited{
    color:#7D2A54;
}

hr.tg{
    border: 0;
    height: 4em;
    background: #2B547E;
    /*background-image: -webkit-linear-gradient(right, #4682b4, #4682b4, #fff);
    background-image: -moz-linear-gradient(right, #4682b4, #4682b4, #fff);
    background-image: -ms-linear-gradient(right, #4682b4, #4682b4, #fff);
    background-image: -o-linear-gradient(right, #4682b4, #4682b4, #fff);*/
    text-align:center;
}
/*
hr.style-eight {
    overflow: visible; /* For IE 
    padding: 0;
    border: none;
    border-top:  double #0174DF;
    color: #333;
    text-align: center;
}*/
hr.tg:after {
    content: "Topology and Groups";
    display: inline-block;
    position: relative;
    top: 0.1em;
    font-size: 3em;
    padding: 0 0.25em;
    color:white;
}

.Theorem{
    display:block;
    margin-left:10px;
    margin-bottom:20px;
    font-style:normal;
}
.Theorem:before{
    content:"Theorem.\00a0\00a0";
    float:left;
    font-weight:bold;
}

.exm{
    display:block;
    margin-left:10px;
    margin-bottom:20px;
    font-style:normal;
}
.exm:before{
    content:"Example.\00a0\00a0";
    float:left;
    font-weight:bold;
}

.Lemma{
    display:block;
    margin-left:10px;
    margin-bottom:20px;
    font-style:normal;
}
.Lemma:before{
    content:"Lemma.\00a0\00a0";
    float:left;
    font-weight:bold;
}

.proof{
    display:block;
    margin-left:10px;
    margin-bottom:30px;
    font-style:normal;
}
.proof:before{
    content:'Proof.\00a0\00a0';
    float:left;
    font-weight:bold;
}
.proof:after{
    content:"\25FC";
    float:right;
}