<p>The argument is a generalized morphism <span class="Math">\alpha</span> by a cospan <span class="Math">a \rightarrow b \leftarrow c</span>. The output is <code class="code">true</code> if <span class="Math">b \leftarrow c</span> is congruent to an identity morphism, <code class="code">false</code> otherwise.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ UnderlyingHonestObject</code>( <var class="Arg">a</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: an object in <span class="Math">\mathbf{A}</span></p>
<p>The argument is an object <span class="Math">a</span> in the generalized morphism category by cospans. The output is its underlying honest object.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ Arrow</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{A}}(a,c)</span></p>
<p>The argument is a generalized morphism <span class="Math">\alpha</span> by a cospan <span class="Math">a \rightarrow b \leftarrow c</span>. The output is its arrow <span class="Math">a \rightarrow b</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ ReversedArrow</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{A}}(c,b)</span></p>
<p>The argument is a generalized morphism <span class="Math">\alpha</span> by a cospan <span class="Math">a \rightarrow b \leftarrow c</span>. The output is its reversed arrow <span class="Math">b \leftarrow c</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ NormalizedCospanTuple</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a pair of morphisms in <span class="Math">\mathbf{A}</span>.</p>
<p>The argument is a generalized morphism <span class="Math">\alpha: a \rightarrow b</span> by a cospan. The output is its normalized cospan pair <span class="Math">(a \rightarrow d, d \leftarrow b)</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ PseudoInverse</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(b,a)</span></p>
<p>The argument is a generalized morphism <span class="Math">\alpha: a \rightarrow b</span> by a cospan. The output is its pseudo inverse <span class="Math">b \rightarrow a</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ GeneralizedInverseByCospan</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(b,a)</span></p>
<p>The argument is a morphism <span class="Math">\alpha: a \rightarrow b \in \mathbf{A}</span>. The output is its generalized inverse <span class="Math">b \rightarrow a</span> by cospan.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IdempotentDefinedBySubobjectByCospan</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(b,b)</span></p>
<p>The argument is a subobject <span class="Math">\alpha: a \hookrightarrow b \in \mathbf{A}</span>. The output is the idempotent <span class="Math">b \rightarrow b \in \mathbf{G(A)}</span> by cospan defined by <span class="Math">\alpha</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IdempotentDefinedByFactorobjectByCospan</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(b,b)</span></p>
<p>The argument is a factorobject <span class="Math">\alpha: b \twoheadrightarrow a \in \mathbf{A}</span>. The output is the idempotent <span class="Math">b \rightarrow b \in \mathbf{G(A)}</span> by cospan defined by <span class="Math">\alpha</span>.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ NormalizedCospan</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(a,b)</span></p>
<p>The argument is a generalized morphism <span class="Math">\alpha: a \rightarrow b</span> by a cospan. The output is its normalization by cospan.</p>
<p>The arguments are a a factorobject <span class="Math">\beta: b \twoheadrightarrow c</span>, and a subobject <span class="Math">\alpha: a \hookrightarrow b</span>. The output is the generalized morphism by cospan from the factorobject to the subobject.</p>
<p>The arguments are morphisms <span class="Math">\alpha: a \rightarrow b</span> and <span class="Math">\beta: c \rightarrow b</span> in <span class="Math">\mathbf{A}</span>. The output is a generalized morphism by cospan with arrow <span class="Math">\alpha</span> and reversed arrow <span class="Math">\beta</span>.</p>
<p>The arguments are morphisms <span class="Math">\alpha: a \leftarrow b</span>, <span class="Math">\beta: b \rightarrow c</span>, and <span class="Math">\gamma: c \leftarrow d</span> in <span class="Math">\mathbf{A}</span>. The output is a generalized morphism by cospan defined by the composition of the given three arrows regarded as generalized morphisms.</p>
<p>The arguments are morphisms <span class="Math">\alpha: a \leftarrow b</span>, and <span class="Math">\beta: b \rightarrow c</span> in <span class="Math">\mathbf{A}</span>. The output is a generalized morphism by cospan defined by the composition of the given two arrows regarded as generalized morphisms.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ AsGeneralizedMorphismByCospan</code>( <var class="Arg">alpha</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a morphism in <span class="Math">\mathrm{Hom}_{\mathbf{G(A)}}(a,b)</span></p>
<p>The argument is a morphism <span class="Math">\alpha: a \rightarrow b</span> in <span class="Math">\mathbf{A}</span>. The output is the honest generalized morphism by cospan defined by <span class="Math">\alpha</span>.</p>
<p>The argument is an abelian category <span class="Math">\mathbf{A}</span>. The output is its generalized morphism category <span class="Math">\mathbf{G(A)}</span> by cospans.</p>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ GeneralizedMorphismByCospansObject</code>( <var class="Arg">a</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: an object in <span class="Math">\mathbf{G(A)}</span></p>
<p>The argument is an object <span class="Math">a</span> in an abelian category <span class="Math">\mathbf{A}</span>. The output is the object in the generalized morphism category by cospans whose underlying honest object is <span class="Math">a</span>.</p>
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