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<h1 >YangBaxter</h1 >
<h2>Combinatorial Solutions for the Yang-Baxter equation</h2>
<p>
0 .10 .7 </p>
<p>
14 July 2025
</p>
</div >
<p><b>
Leandro Vendramin
</b>
<br />Email: <span class="URL" ><a href="mailto:Leandro.Vendramin@vub.be" >Leandro.Vendramin@vub.be</a></span >
<br />Homepage: <span class="URL" ><a href="https://vendramin.github.io/ " >https://vendramin.github.io/</a></span >
<br />Address : <br />Vrije Universiteit Brussel<br /> Faculty of Sciences<br /> Department of Mathematics and Data Science<br /> Pleinlaan 2 , B-1050 <br /> Brussel, Belgium<br />
</p><p><b>
Olexandr Konovalov
</b>
<br />Email: <span class="URL" ><a href="mailto:obk1@st-andrews.ac.uk" >obk1@st-andrews.ac.uk</a></span >
<br />Homepage: <span class="URL" ><a href="https://olexandr-konovalov.github.io/ " >https://olexandr-konovalov.github.io/</a></span >
<br />Address : <br />School of Computer Science<br /> University of St Andrews<br /> Jack Cole Building, North Haugh,<br /> St Andrews, Fife, KY16 9 SX, Scotland<br />
</p>
<p><a id="X8537FEB07AF2BEC8" name="X8537FEB07AF2BEC8" ></a></p>
<div class="contents" >
<h3>Contents<a id="contents" name="contents" ></a></h3>
<div class="ContChap" ><a href="chap1_mj.html#X8749E1888244CC3D" >1 <span class="Heading" >Preliminaries</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap1_mj.html#X7BB9D67179296AA0" >1 .1 <span class="Heading" >Definition and examples</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7F66BB617A79542D" >1 .1 -1 IsSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7C2FB9E27C641F49" >1 .1 -2 Skewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7BBF6AC978DC5CC1" >1 .1 -3 SmallSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7B1AAF517D8D209D" >1 .1 -4 TrivialBrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X82BB1BB37932DF70" >1 .1 -5 TrivialSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X86AFF9C586B5C2B1" >1 .1 -6 SmallBrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7ED6436A7DC2AB48" >1 .1 -7 IdSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7DF9D5E8817C3564" >1 .1 -8 AutomorphismGroup</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X80F7E6B78327BD5E" >1 .1 -9 IdBrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X79746AAC863EA794" >1 .1 -10 IsomorphismSkewbraces</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X87A9198C8456D193" >1 .1 -11 DirectProductSkewbraces</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X879A94807C0A65D2" >1 .1 -12 DirectProductOp</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X84880C7484699973" >1 .1 -13 IsTwoSided</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X84CB08C88574F438" >1 .1 -14 IsAutomorphismGroupOfSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7BC5B7CF7877F333" >1 .1 -15 IsClassical</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7B398DBF7B2476B5" >1 .1 -16 IsOfAbelianType</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X78A3A59A86F96508" >1 .1 -17 IsBiSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X797C4B6480DFCDDA" >1 .1 -18 IsOfNilpotentType</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7F8C6C4B81096AF0" >1 .1 -19 IsTrivialSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X8426ABE1808B92DC" >1 .1 -20 Skewbrace2YB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7F09E6DE78CC240B" >1 .1 -21 Brace2YB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7E2F64338788EBF9" >1 .1 -22 SkewbraceSubset2YB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X8439C2087DD1D9A6" >1 .1 -23 SemidirectProduct</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X86D6131182AE2DBC" >1 .1 -24 UnderlyingAdditiveGroup</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X840A631685DA79D6" >1 .1 -25 UnderlyingMultiplicativeGroup</a></span >
</div ></div >
</div >
<div class="ContChap" ><a href="chap2_mj.html#X8237B3628443C3FA" >2 <span class="Heading" >Algebraic Properties of Braces</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X8714568A80DBF0EF" >2 .1 <span class="Heading" >Braces and Radical Rings</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X86C2A9257D2D1CAF" >2 .1 -1 AdditiveGroupOfRing</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X7816FE1786837102" >2 .1 -2 IsJacobsonRadical</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X80AF1831874915EB" >2 .2 <span class="Heading" >Braces and Yang-Baxter Equation</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X7AEBEF6F7CFCA074" >2 .2 -1 Table2YB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X825856827B8F9B3C" >2 .2 -2 Evaluate</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X7EB5F8BE80E57D3E" >2 .2 -3 LyubashenkoYB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X7B14202778611DA1" >2 .2 -4 IsIndecomposable</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X83B5B0B678E85958" >2 .2 -5 Table </a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X815F6E1287725A92" >2 .2 -6 DehornoyClass</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X86A7FA1E843A438E" >2 .2 -7 DehornoyRepresentationOfStructureGroup</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X8596E3EA7E4C1067" >2 .2 -8 IdYB</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap2_mj.html#X829BF82C814E5498" >2 .2 -9 LinearRepresentationOfStructureGroup</a></span >
</div ></div >
</div >
<div class="ContChap" ><a href="chap3_mj.html#X81D398D67DC78FB5" >3 <span class="Heading" >YangBaxter automatic generated documentation</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap3_mj.html#X7C287494794C9DD6" >3 .1 <span class="Heading" >YangBaxter automatic generated documentation of properties</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap3_mj.html#X84D5AD107FCE1467" >3 .1 -1 IsIndecomposable</a></span >
</div ></div >
</div >
<div class="ContChap" ><a href="chap4_mj.html#X7FF13C7684E1122C" >4 <span class="Heading" >Ideals and left ideals</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4_mj.html#X81E965A37A7EA22A" >4 .1 <span class="Heading" >Left ideals</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X814FEB578507E81C" >4 .1 -1 LeftIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7AE9FAB479569BF9" >4 .1 -2 StrongLeftIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X829DFD167A8D0D4A" >4 .1 -3 IsLeftIdeal</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4_mj.html#X83629803819C4A6F" >4 .2 <span class="Heading" >Ideals</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X879540527DA666C4" >4 .2 -1 IsIdeal</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7EBF92377C5E417D" >4 .2 -2 Ideals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X809F4B407D4BDE47" >4 .2 -3 AsIdeal</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7F0A2FBA87465560" >4 .2 -4 IdealGeneratedBy</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X8721D11884A2CDAD" >4 .2 -5 IntersectionOfTwoIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X85A4F7FE7B627615" >4 .2 -6 SumOfTwoIdeals</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4_mj.html#X8079CE3187FE380D" >4 .3 <span class="Heading" >Sequences (left) ideals</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X845E09BF86C4DD2E" >4 .3 -1 LeftSeries</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7B9ED49481948B91" >4 .3 -2 RightSeries</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X84C0A78F7B2845FD" >4 .3 -3 IsLeftNilpotent</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X79EA70287B245D65" >4 .3 -4 IsSimpleSkewbrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7D930A7679D97788" >4 .3 -5 IsRightNilpotent</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X81593E537B94350B" >4 .3 -6 LeftNilpotentIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7B6EB5A37EBFFB7D" >4 .3 -7 RightNilpotentIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7E9665EB79226E96" >4 .3 -8 SmoktunowiczSeries</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7D503F497CB34B9D" >4 .3 -9 Socle</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7FF15DAA78E08F0A" >4 .3 -10 Annihilator</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4_mj.html#X876342AF7CF51C9B" >4 .4 <span class="Heading" >Mutipermutation skew braces</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7E0053787EDFEAFB" >4 .4 -1 SocleSeries</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X85AA85F57FF7BD73" >4 .4 -2 MultipermutationLevel</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X824956137F4CEF3C" >4 .4 -3 IsMultipermutation</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X8616F73781699DC3" >4 .4 -4 Fix</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7CE04CC57E82FD02" >4 .4 -5 KernelOfLambda</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7CE55DAF7CB85B89" >4 .4 -6 Quotient</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4_mj.html#X7826660686D57FD6" >4 .5 <span class="Heading" >Prime and semiprime ideals</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X82CDAD02845051FA" >4 .5 -1 IsPrimeBrace</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X834AED5184F2B9AC" >4 .5 -2 IsPrimeIdeal</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X80D35A2880B39EB0" >4 .5 -3 PrimeIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X820951168658A704" >4 .5 -4 IsSemiprime</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X80961A4F7CBFBA0B" >4 .5 -5 IsSemiprimeIdeal</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7A8C53838192CEC3" >4 .5 -6 SemiprimeIdeals</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X7D6E642D817352AF" >4 .5 -7 BaerRadical</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X8571BC2F80364341" >4 .5 -8 IsBaer</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X856E8ABD7BCA81D5" >4 .5 -9 WedderburnRadical</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X85F4D83079E1013A" >4 .5 -10 SolvableSeries</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X86623B417F4F07FE" >4 .5 -11 IsMinimalIdeal</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4_mj.html#X837D770278330FE0" >4 .5 -12 MinimalIdeals</a></span >
</div ></div >
</div >
<div class="ContChap" ><a href="chapBib_mj.html" ><span class="Heading" >References</span ></a></div >
<div class="ContChap" ><a href="chapInd_mj.html" ><span class="Heading" >Index</span ></a></div >
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