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height="14" viewBox="0 0 14 14"><path d="M13 3.41 11.59 2 5 8.59 2.41 6 1 7.41l4 4z"/></svg> <span class="s-post-summary--stats-item-number">6</span> <span class="s-post-summary--stats-item-unit">answers</span> </div> <div class="s-post-summary--stats-item is-warm" title="1851 views"> <span class="s-post-summary--stats-item-number">2k</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/28320/convincing-the-contrapositive-is-equivalent" class="s-link">Convincing the contrapositive is equivalent</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-proofs t-contrapositive"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/proofs" class="s-tag post-tag flex--item mt0 js-tagname-proofs" title="show questions tagged 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class="s-post-summary--stats-item-number">0</span> <span class="s-post-summary--stats-item-unit">answers</span> </div> <div class="s-post-summary--stats-item " title="26 views"> <span class="s-post-summary--stats-item-number">26</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/28340/problem-involving-vectors-and-surfaces" class="s-link">Problem involving vectors and surfaces</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-vector-calculus"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/vector-calculus" class="s-tag post-tag flex--item mt0 js-tagname-vector-calculus" title="show questions tagged 'vector-calculus'" aria-label="show questions tagged 'vector-calculus'" rel="tag" 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class="s-post-summary--content-title"> <a href="/questions/28338/why-not-bidmsa-rather-than-bidmas" class="s-link">Why not BIDMSA rather than BIDMAS?</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-primary-education t-notation"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/primary-education" class="s-tag post-tag flex--item mt0 js-tagname-primary-education" title="show questions tagged 'primary-education'" aria-label="show questions tagged 'primary-education'" rel="tag" aria-labelledby="tag-primary-education-tooltip-container" data-tag-menu-origin="Unknown">primary-education</a></li><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/notation" class="s-tag post-tag flex--item mt0 js-tagname-notation" title="show questions tagged 'notation'" aria-label="show questions tagged 'notation'" rel="tag" 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s-link__muted">answered <span title='2024-12-15 23:45:45Z' class='relativetime'>Dec 15 at 23:45</span></a> </time> </div> </div> </div> </div> <div id="question-summary-376" class="s-post-summary js-post-summary" data-post-id="376" data-post-type-id="1"> <div class="s-post-summary--stats js-post-summary-stats"> <div class="s-post-summary--stats-item s-post-summary--stats-item__emphasized" title="Score of 20"> <span class="s-post-summary--stats-item-number">20</span> <span class="s-post-summary--stats-item-unit">votes</span> </div> <div class="s-post-summary--stats-item has-answers " title="6 answers"> <span class="s-post-summary--stats-item-number">6</span> <span class="s-post-summary--stats-item-unit">answers</span> </div> <div class="s-post-summary--stats-item is-hot" title="14065 views"> <span class="s-post-summary--stats-item-number">14k</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/376/applications-of-vector-calculus-to-economics-finance" class="s-link">Applications of Vector Calculus to Economics/Finance</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-vector-calculus"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/vector-calculus" class="s-tag post-tag flex--item mt0 js-tagname-vector-calculus" title="show questions tagged 'vector-calculus'" aria-label="show questions tagged 'vector-calculus'" rel="tag" aria-labelledby="tag-vector-calculus-tooltip-container" data-tag-menu-origin="Unknown">vector-calculus</a></li></ul> </div> <div class="s-user-card s-user-card__minimal" aria-live="polite"> <a href="/users/24752/marissa" class="s-avatar s-avatar__16 s-user-card--avatar" data-user-id="24752"> <div class="gravatar-wrapper-16"> <img 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s-post-summary--stats-item__emphasized" title="Score of 35"> <span class="s-post-summary--stats-item-number">35</span> <span class="s-post-summary--stats-item-unit">votes</span> </div> <div class="s-post-summary--stats-item has-answers has-accepted-answer" title="one of the answers was accepted as the correct answer"> <svg aria-hidden="true" class="svg-icon iconCheckmarkSm" width="14" height="14" viewBox="0 0 14 14"><path d="M13 3.41 11.59 2 5 8.59 2.41 6 1 7.41l4 4z"/></svg> <span class="s-post-summary--stats-item-number">11</span> <span class="s-post-summary--stats-item-unit">answers</span> </div> <div class="s-post-summary--stats-item is-warm" title="4787 views"> <span class="s-post-summary--stats-item-number">5k</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/1589/is-there-any-proof-of-the-fundamental-theorem-of-algebra-that-can-be-introduced" class="s-link">Is there any proof of the fundamental theorem of algebra that can be introduced to undergraduates who have just completed Calc III?</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-undergraduate-education t-prerequisites"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/undergraduate-education" class="s-tag post-tag flex--item mt0 js-tagname-undergraduate-education" title="show questions tagged 'undergraduate-education'" aria-label="show questions tagged 'undergraduate-education'" rel="tag" aria-labelledby="tag-undergraduate-education-tooltip-container" data-tag-menu-origin="Unknown">undergraduate-education</a></li><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/prerequisites" class="s-tag post-tag flex--item mt0 js-tagname-prerequisites" title="show questions tagged 'prerequisites'" aria-label="show questions tagged 'prerequisites'" rel="tag" aria-labelledby="tag-prerequisites-tooltip-container" data-tag-menu-origin="Unknown">prerequisites</a></li></ul> </div> <div class="s-user-card s-user-card__minimal" aria-live="polite"> <a href="/users/276/martin" class="s-avatar s-avatar__16 s-user-card--avatar" data-user-id="276"> <div class="gravatar-wrapper-16"> <img src="https://i.sstatic.net/OrLCI.png?s=32" alt="Martin's user avatar" width="16" , height="16" class="s-avatar--image" /> </div> </a> <div class="s-user-card--info"> <div class="s-user-card--link d-flex gs4" > <a href="/users/276/martin" class="flex--item">Martin</a> </div> <ul class="s-user-card--awards"> <li class="s-user-card--rep"><span class="todo-no-class-here" title="reputation score " dir="ltr">115</span></li> </ul> </div> <time class="s-user-card--time"> <a href="/questions/1589/is-there-any-proof-of-the-fundamental-theorem-of-algebra-that-can-be-introduced?lastactivity" class="s-link s-link__muted">modified <span title='2024-12-14 01:23:13Z' class='relativetime'>Dec 14 at 1:23</span></a> </time> </div> </div> </div> </div> <div id="question-summary-27543" class="s-post-summary js-post-summary" data-post-id="27543" data-post-type-id="1"> <div class="s-post-summary--stats js-post-summary-stats"> <div class="s-post-summary--stats-item s-post-summary--stats-item__emphasized" title="Score of 5"> <span class="s-post-summary--stats-item-number">5</span> <span class="s-post-summary--stats-item-unit">votes</span> </div> <div class="s-post-summary--stats-item has-answers " title="1 answer"> <span class="s-post-summary--stats-item-number">1</span> <span class="s-post-summary--stats-item-unit">answer</span> </div> <div class="s-post-summary--stats-item " title="120 views"> <span class="s-post-summary--stats-item-number">120</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/27543/seeking-advice-on-incorporating-online-discussions-into-course-grading" class="s-link">Seeking Advice on Incorporating Online Discussions into Course Grading</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-grading t-assessment"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/grading" class="s-tag post-tag flex--item mt0 js-tagname-grading" title="show questions tagged 'grading'" aria-label="show questions tagged 'grading'" rel="tag" aria-labelledby="tag-grading-tooltip-container" data-tag-menu-origin="Unknown">grading</a></li><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/assessment" class="s-tag post-tag flex--item mt0 js-tagname-assessment" title="show questions tagged 'assessment'" aria-label="show questions tagged 'assessment'" rel="tag" aria-labelledby="tag-assessment-tooltip-container" data-tag-menu-origin="Unknown">assessment</a></li></ul> </div> <div class="s-user-card s-user-card__minimal" aria-live="polite"> <a href="/users/6589/cheyne" class="s-avatar s-avatar__16 s-user-card--avatar" data-user-id="6589"> <div class="gravatar-wrapper-16"> <img src="https://www.gravatar.com/avatar/a4c2efe12f6b8bee859c1826d5dae49d?s=32&d=identicon&r=PG&f=y&so-version=2" alt="cheyne's user avatar" width="16" , height="16" class="s-avatar--image" /> </div> </a> <div class="s-user-card--info"> <div class="s-user-card--link d-flex gs4" > <a href="/users/6589/cheyne" class="flex--item">cheyne</a> </div> <ul class="s-user-card--awards"> <li class="s-user-card--rep"><span class="todo-no-class-here" title="reputation score " dir="ltr">320</span></li> </ul> </div> <time class="s-user-card--time"> <a href="/questions/27543/seeking-advice-on-incorporating-online-discussions-into-course-grading?lastactivity" class="s-link s-link__muted">answered <span title='2024-12-13 19:29:03Z' class='relativetime'>Dec 13 at 19:29</span></a> </time> </div> </div> </div> </div> <div id="question-summary-12812" class="s-post-summary js-post-summary" data-post-id="12812" data-post-type-id="1"> <div class="s-post-summary--stats js-post-summary-stats"> <div class="s-post-summary--stats-item s-post-summary--stats-item__emphasized" title="Score of 19"> <span class="s-post-summary--stats-item-number">19</span> <span class="s-post-summary--stats-item-unit">votes</span> </div> <div class="s-post-summary--stats-item has-answers " title="1 answer"> <span class="s-post-summary--stats-item-number">1</span> <span class="s-post-summary--stats-item-unit">answer</span> </div> <div class="s-post-summary--stats-item is-warm" title="7780 views"> <span class="s-post-summary--stats-item-number">8k</span> <span class="s-post-summary--stats-item-unit">views</span> </div> </div> <div class="s-post-summary--content"> <h3 class="s-post-summary--content-title"> <a href="/questions/12812/is-maclane-and-birkoffs-algebra-suitable-today-as-either-an-undergraduate-or" class="s-link">Is MacLane and Birkoff's "Algebra" suitable today as either an undergraduate or graduate text in abstract algebra?</a> </h3> <div class="s-post-summary--meta"> <div class="s-post-summary--meta-tags d-inline-block tags js-tags t-undergraduate-education t-textbooks t-graduate-education t-abstract-algebra"> <ul class='ml0 list-ls-none js-post-tag-list-wrapper d-inline'><li class='d-inline mr4 js-post-tag-list-item'><a href="/questions/tagged/undergraduate-education" class="s-tag post-tag flex--item mt0 js-tagname-undergraduate-education" title="show questions tagged 'undergraduate-education'" aria-label="show questions tagged 'undergraduate-education'" rel="tag" aria-labelledby="tag-undergraduate-education-tooltip-container" data-tag-menu-origin="Unknown">undergraduate-education</a></li><li class='d-inline mr4 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