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Macaulay2-1.3.1-8.fc15.i686.rpm

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<head><title>describe -- real description</title>
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<div><h1>describe -- real description</h1>
<div class="single"><h2>Description</h2>
<div><tt>describe x</tt> -- returns <span>a <a href="___Net.html">net</a></span> containing the real description of <tt>x</tt>, bypassing the feature that causes certain types of things to acquire, for brevity, the names of global variables to which they are assigned.  For polynomial rings, it also displays the options used at creation.<p/>
<table class="examples"><tr><td><pre>i1 : R = ZZ/101[a,b,c_1,c_2];</pre>
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<tr><td><pre>i2 : R

o2 = R

o2 : PolynomialRing</pre>
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<tr><td><pre>i3 : describe R

      ZZ
o3 = ---[a..b, c , c , Degrees => {4:1}, Heft => {1}, MonomialOrder => {MonomialSize => 32}, DegreeRank => 1]
     101        1   2                                                  {GRevLex => {4:1}  }
                                                                       {Position => Up    }</pre>
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<tr><td><pre>i4 : toString describe R

o4 =  ZZ
     ---[a..b, c , c , Degrees => {4:1}, Heft => {1}, MonomialOrder => {MonomialSize => 32}, DegreeRank => 1]
     101        1   2                                                  {GRevLex => {4:1}  }
                                                                       {Position => Up    }</pre>
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<tr><td><pre>i5 : toExternalString R

o5 = (ZZ/101)[a..b, c_1, c_2, Degrees => {4:1}, Heft => {1}, MonomialOrder =>
     VerticalList{MonomialSize => 32, GRevLex => {4:1}, Position => Up},
     DegreeRank => 1]</pre>
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<tr><td><pre>i6 : QQ[x,d,WeylAlgebra=>{x=>d}]

o6 = QQ[x, d]

o6 : PolynomialRing</pre>
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<tr><td><pre>i7 : describe oo

o7 = QQ[x, d, Degrees => {2:1}, Heft => {1}, MonomialOrder =>
                                                             
                                                             
     ------------------------------------------------------------------------
     {MonomialSize => 32}, DegreeRank => 1, WeylAlgebra => {x => d}]
     {GRevLex => {2:1}  }
     {Position => Up    }</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="_to__String.html" title="convert to a string">toString</a> -- convert to a string</span></li>
<li><span><a href="_to__External__String.html" title="convert to a readable string">toExternalString</a> -- convert to a readable string</span></li>
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<div class="waystouse"><h2>Ways to use <tt>describe</tt> :</h2>
<ul><li>describe(FractionField)</li>
<li>describe(GaloisField)</li>
<li>describe(GeneralOrderedMonoid)</li>
<li>describe(PolynomialRing)</li>
<li>describe(QuotientRing)</li>
<li>describe(Thing)</li>
<li>describe(Variety)</li>
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