A Categorical Construction of Ultrafilters

Daniel  Litt; Zachary  Abel; Scott Duke Kominers

}
//]]>
</script>
<input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="E39AC016" />
<script type="text/javascript">RegisterSod("sp.core.js", "\u002f_layouts\u002fsp.core.js?rev=7ByNlH\u00252BvcgRJg\u00252BRCctdC0w\u00253D\u00253D");</script><script type="text/javascript">RegisterSod("sp.res.resx", "\u002f_layouts\u002fScriptResx.ashx?culture=en\u00252Dus\u0026name=SP\u00252ERes\u0026rev=b6\u00252FcRx1a6orhAQ\u00252FcF\u00252B0ytQ\u00253D\u00253D");</script><script type="text/javascript">RegisterSod("sp.ui.dialog.js", "\u002f_layouts\u002fsp.ui.dialog.js?rev=Tpcmo1\u00252FSu6R0yewHowDl5g\u00253D\u00253D");RegisterSodDep("sp.ui.dialog.js", "sp.core.js");RegisterSodDep("sp.ui.dialog.js", "sp.res.resx");</script><script type="text/javascript">RegisterSod("core.js", "\u002f_layouts\u002f1033\u002fcore.js?rev=Emb5hNX1RZMNXk9oS82yvA\u00253D\u00253D");</script>
<script type="text/javascript">
//<![CDATA[
var _spFormDigestRefreshInterval = 1440000;window.g_updateFormDigestPageLoaded = new Date(); window.g_updateFormDigestPageLoaded.setDate(window.g_updateFormDigestPageLoaded.getDate() -5);function loadMDN2() { EnsureScript('MDN.js', typeof(loadFilterFn), null); }
function loadMDN1() { ExecuteOrDelayUntilScriptLoaded(loadMDN2, 'sp.ribbon.js'); }
_spBodyOnLoadFunctionNames.push('loadMDN1');//]]>
</script>
<script type="text/javascript">RegisterSod("sp.runtime.js", "\u002f_layouts\u002fsp.runtime.js?rev=IGffcZfunndj0247nOxKVg\u00253D\u00253D");RegisterSodDep("sp.runtime.js", "sp.core.js");RegisterSodDep("sp.runtime.js", "sp.res.resx");</script><script type="text/javascript">RegisterSod("sp.js", "\u002f_layouts\u002fsp.js?rev=\u00252B4ZEyA892P3T0504qi0paw\u00253D\u00253D");RegisterSodDep("sp.js", "sp.core.js");RegisterSodDep("sp.js", "sp.runtime.js");RegisterSodDep("sp.js", "sp.ui.dialog.js");RegisterSodDep("sp.js", "sp.res.resx");</script><script type="text/javascript">RegisterSod("cui.js", "\u002f_layouts\u002fcui.js?rev=OOyJv78CADNBeet\u00252FvTvniQ\u00253D\u00253D");</script><script type="text/javascript">RegisterSod("inplview", "\u002f_layouts\u002finplview.js?rev=WB6Gy8a027aeNCq7koVCUg\u00253D\u00253D");RegisterSodDep("inplview", "core.js");RegisterSodDep("inplview", "sp.js");</script><script type="text/javascript">RegisterSod("ribbon", "\u002f_layouts\u002fsp.ribbon.js?rev=F\u00252BUEJ66rbXzSvpf7nN69wQ\u00253D\u00253D");RegisterSodDep("ribbon", "core.js");RegisterSodDep("ribbon", "sp.core.js");RegisterSodDep("ribbon", "sp.js");RegisterSodDep("ribbon", "cui.js");RegisterSodDep("ribbon", "sp.res.resx");RegisterSodDep("ribbon", "sp.runtime.js");RegisterSodDep("ribbon", "inplview");</script><script type="text/javascript">RegisterSod("sp.ui.policy.resources.resx", "\u002f_layouts\u002fScriptResx.ashx?culture=en\u00252Dus\u0026name=SP\u00252EUI\u00252EPolicy\u00252EResources\u0026rev=YhBHGmUAGyJ3lAgSdE4V\u00252Fw\u00253D\u00253D");</script><script type="text/javascript">RegisterSod("mdn.js", "\u002f_layouts\u002fmdn.js?rev=gwmFFJ2\u00252FfFacqXWAqG\u00252FqKg\u00253D\u00253D");RegisterSodDep("mdn.js", "sp.core.js");RegisterSodDep("mdn.js", "sp.runtime.js");RegisterSodDep("mdn.js", "sp.js");RegisterSodDep("mdn.js", "cui.js");RegisterSodDep("mdn.js", "ribbon");RegisterSodDep("mdn.js", "sp.ui.policy.resources.resx");</script>
<script type="text/javascript">
//<![CDATA[

function _spNavigateHierarchyEx(nodeDiv, dataSourceId, dataPath, url, listInContext, type, additionalQString) {
    SetAdditionalNavigateHierarchyQString(additionalQString);
    g_originalSPNavigateFunc(nodeDiv, dataSourceId, dataPath, url, listInContext, type);
}

g_originalSPNavigateFunc = _spNavigateHierarchy;
_spNavigateHierarchy = _spNavigateHierarchyEx;
var _fV4UI = true;//]]>
</script>
<script type="text/javascript">RegisterSod("msstring.js", "\u002f_layouts\u002f1033\u002fmsstring.js?rev=QtiIcPH3HV7LgVSO7vONFg\u00253D\u00253D");</script><script type="text/javascript">RegisterSod("browserScript", "\u002f_layouts\u002f1033\u002fnon_ie.js?rev=EVTj1bu32\u00252FMla6SDN\u00252FsNTA\u00253D\u00253D");</script>
<script type="text/javascript">
//<![CDATA[
var __wpmExportWarning='This Web Part Page has been personalized. As a result, one or more Web Part properties may contain confidential information. Make sure the properties contain information that is safe for others to read. After exporting this Web Part, view properties in the Web Part description file (.WebPart) by using a text editor such as Microsoft Notepad.';var __wpmCloseProviderWarning='You are about to close this Web Part.  It is currently providing data to other Web Parts, and these connections will be deleted if this Web Part is closed.  To close this Web Part, click OK.  To keep this Web Part, click Cancel.';var __wpmDeleteWarning='You are about to permanently delete this Web Part.  Are you sure you want to do this?  To delete this Web Part, click OK.  To keep this Web Part, click Cancel.';//]]>
</script>
</form>

Go to main content

Article | Rocky Mountain Journal of Mathematics | 2010

A Categorical Construction of Ultrafilters

by Daniel Litt, Zachary Abel and Scott Duke Kominers

Format: Print

Read Now

Citation:

Litt, Daniel, Zachary Abel, and Scott Duke Kominers. "A Categorical Construction of Ultrafilters." Rocky Mountain Journal of Mathematics 40, no. 5 (2010): 1611–1617.

Faculty & Research

A Categorical Construction of Ultrafilters

Citation:

About the Author

More from the Author