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Errors
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 121
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <htm..."
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <htm..."
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Line: 249 Column: 2 - 5
"...link" > <li><a tar..." Line: 250 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 251 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 252 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 253 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 254 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 255 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 256 Column: 1 - 4
"...</a></li> <li><a tar..."
"...link" > <li><a tar..." Line: 250 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 251 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 252 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 253 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 254 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 255 Column: 1 - 4
"...</a></li> <li><a tar..." Line: 256 Column: 1 - 4
"...</a></li> <li><a tar..."
Duplicate ID “system-message-container”.
Line: 288 Column: 1 - 35
"... <div id="system-message-container"> </div..."
"... <div id="system-message-container"> </div..."
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
Line: 352 Column: 6 - 75
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
Line: 352 Column: 6 - 75
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
The “border” attribute on the “table” element is obsolete. Use CSS instead.
Line: 352 Column: 6 - 75
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
"...div> <table class="jevicons" border="0" cellpadding="10" cellspacing="0" > ..." Line: 355 Column: 7 - 56
"...r"> <table border="0" cellpadding="0" cellspacing="0"> ..." Line: 393 Column: 2 - 101
"...stom" > <table style="width: 100%; height: 344px;" id="Table_01" border="0" cellpadding="0" cellspacing="0"> <tbod..." Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
The “align” attribute on the “td” element is obsolete. Use CSS instead.
Line: 354 Column: 10 - 41
"... <tr> <td class="tableh1" align="center"> ..."
"... <tr> <td class="tableh1" align="center"> ..."
The “nowrap” attribute on the “td” element is obsolete. Use CSS instead.
Line: 357 Column: 12 - 50
"... <tr> <td class="buttontext" nowrap="nowrap" > ..." Line: 362 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..." Line: 367 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..." Line: 372 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..."
"... <tr> <td class="buttontext" nowrap="nowrap" > ..." Line: 362 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..." Line: 367 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..." Line: 372 Column: 11 - 55
"... </td> <td class="buttontext" nowrap="nowrap" > ..."
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
Line: 401 Column: 5 - 97
"...</tr> <tr> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold;" valign="top"><a hre..." Line: 402 Column: 167 - 117
"...g</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 403 Column: 209 - 117
"...o</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 406 Column: 5 - 117
"...</tr> <tr> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%;" valign="top">Thông ..." Line: 407 Column: 169 - 137
"...n học</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Thông ..." Line: 408 Column: 199 - 137
"... giới</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Nội sa..." Line: 416 Column: 5 - 97
"...</tr> <tr> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold;" valign="top"><a hre..." Line: 417 Column: 236 - 117
"...n</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 418 Column: 194 - 117
"...g</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a hre..." Line: 421 Column: 5 - 117
"...</tr> <tr> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%;" valign="top">Thông ..." Line: 422 Column: 168 - 137
"... Viện</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Câu lạ..." Line: 423 Column: 198 - 137
"...thông</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Giải t..."
"...</tr> <tr> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold;" valign="top"><a hre..." Line: 402 Column: 167 - 117
"...g</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 403 Column: 209 - 117
"...o</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 406 Column: 5 - 117
"...</tr> <tr> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%;" valign="top">Thông ..." Line: 407 Column: 169 - 137
"...n học</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Thông ..." Line: 408 Column: 199 - 137
"... giới</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Nội sa..." Line: 416 Column: 5 - 97
"...</tr> <tr> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold;" valign="top"><a hre..." Line: 417 Column: 236 - 117
"...n</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a tar..." Line: 418 Column: 194 - 117
"...g</a></td> <td style="color: #474747; font-family: Arial; font-size: 13px; font-weight: bold; padding-left: 15px;" valign="top"><a hre..." Line: 421 Column: 5 - 117
"...</tr> <tr> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%;" valign="top">Thông ..." Line: 422 Column: 168 - 137
"... Viện</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Câu lạ..." Line: 423 Column: 198 - 137
"...thông</td> <td style="color: #525252; font-family: Arial; font-size: 12px; font-style: italic; line-height: 140%; padding-left: 15px;" valign="top">Giải t..."
The “width” attribute on the “table” element is obsolete. Use CSS instead.
Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
The “align” attribute on the “table” element is obsolete. Use CSS instead.
Line: 475 Column: 6 - 115
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
"...le"> <table class="mod_events_latest_table" width="100%" border="0" cellspacing="0" cellpadding="0" align="center"><tr><t..."
Bad value for attribute “href” on element “a”: Illegal character in path segment: “|” is not allowed.
Line: 475 Column: 297 - 516
"..._content"><a href="/vi/icalrepeat.detail/2018/04/15/3125/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/hoi-nghi-quoc-te-ve-to-hop-ly-thuyet-do-thi-va-ung-dung-lan-thu-i.html" >Hội ng..." Line: 477 Column: 176 - 395
"..._content"><a href="/vi/icalrepeat.detail/2018/05/17/3152/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/international-workshop-control-and-optimization-problems-coop2018.html" >Intern..." Line: 480 Column: 176 - 389
"..._content"><a href="/vi/icalrepeat.detail/2018/09/10/3147/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/the-10th-japan-vietnam-joint-seminar-on-commutative-algebra.html" >The 10..."
"..._content"><a href="/vi/icalrepeat.detail/2018/04/15/3125/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/hoi-nghi-quoc-te-ve-to-hop-ly-thuyet-do-thi-va-ung-dung-lan-thu-i.html" >Hội ng..." Line: 477 Column: 176 - 395
"..._content"><a href="/vi/icalrepeat.detail/2018/05/17/3152/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/international-workshop-control-and-optimization-problems-coop2018.html" >Intern..." Line: 480 Column: 176 - 389
"..._content"><a href="/vi/icalrepeat.detail/2018/09/10/3147/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/the-10th-japan-vietnam-joint-seminar-on-commutative-algebra.html" >The 10..."
Bad value “/vi/icalrepeat.detail/2018/04/19/3120/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/hoi-thao-toi-uu-va-tinh-toan-khoa-hoc-lan-thu-16.html” for attribute “href” on element “a”: Illegal character in path segment: “|” is not allowed.
Line: 476 Column: 176 - 378
"..._content"><a href="/vi/icalrepeat.detail/2018/04/19/3120/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/hoi-thao-toi-uu-va-tinh-toan-khoa-hoc-lan-thu-16.html" >Hội th..."
"..._content"><a href="/vi/icalrepeat.detail/2018/04/19/3120/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/hoi-thao-toi-uu-va-tinh-toan-khoa-hoc-lan-thu-16.html" >Hội th..."
Bad value “/vi/icalrepeat.detail/2018/06/25/3168/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/arithmetic-and-geometry-of-local-and-global-fields.html” for attribute “href” on element “a”: Illegal character in path segment: “|” is not allowed.
Line: 478 Column: 176 - 380
"..._content"><a href="/vi/icalrepeat.detail/2018/06/25/3168/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/arithmetic-and-geometry-of-local-and-global-fields.html" >Arithm..."
"..._content"><a href="/vi/icalrepeat.detail/2018/06/25/3168/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/arithmetic-and-geometry-of-local-and-global-fields.html" >Arithm..."
Bad value “/vi/icalrepeat.detail/2018/08/14/3138/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/dai-hoi-toan-hoc-viet-nam-lan-thu-9.html” for attribute “href” on element “a”: Illegal character in path segment: “|” is not allowed.
Line: 479 Column: 176 - 365
"..._content"><a href="/vi/icalrepeat.detail/2018/08/14/3138/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/dai-hoi-toan-hoc-viet-nam-lan-thu-9.html" >Đại hộ..."
"..._content"><a href="/vi/icalrepeat.detail/2018/08/14/3138/434|429|435|430|432|440|438|431|437|436|439|433|453|454|459|456|458|457|455|469|448|449|460|487|495/dai-hoi-toan-hoc-viet-nam-lan-thu-9.html" >Đại hộ..."
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Line: 565 Column: 5 - 42
"...ner"> <div id="zt-copyright" align="center"> ..."
"...ner"> <div id="zt-copyright" align="center"> ..."
Stray end tag “div”.
Line: 578 Column: 1 - 6
"... </div> </..."
"... </div> </..."
Warnings
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Line: 83 Column: 1 - 23
"...-xemina"> <a name="Top" id="Top"></a> <..."
"...-xemina"> <a name="Top" id="Top"></a> <..."
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Line: 137 Column: 5 - 65
"...m" > <p><img src="/images/banners/Banner-vn.png" border="0" alt="" /></p></..." Line: 398 Column: 5 - 110
"...</td> <td><img src="/images/stories/hdkh/chuyenmuc_03.gif" alt="chuyenmuc 03" height="109" width="153" border="0" /></td> ..." Line: 550 Column: 2 - 63
"... > <p> <img alt="" border="0" src="/images/math-footer/footer.png" /></p> <..."
"...m" > <p><img src="/images/banners/Banner-vn.png" border="0" alt="" /></p></..." Line: 398 Column: 5 - 110
"...</td> <td><img src="/images/stories/hdkh/chuyenmuc_03.gif" alt="chuyenmuc 03" height="109" width="153" border="0" /></td> ..." Line: 550 Column: 2 - 63
"... > <p> <img alt="" border="0" src="/images/math-footer/footer.png" /></p> <..."
The first occurrence of ID “system-message-container” was here.
Line: 207 Column: 1 - 35
"... <div id="system-message-container"> </div..."
"... <div id="system-message-container"> </div..."
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math.ac.vn Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
math.ac.vn TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.