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- W2964204159 abstract "Let <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper E upper S left-parenthesis n right-parenthesis> <mml:semantics> <mml:mrow> <mml:mi>E</mml:mi> <mml:mi>S</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> <mml:annotation encoding=application/x-tex>ES(n)</mml:annotation> </mml:semantics> </mml:math> </inline-formula> be the smallest integer such that any set of <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper E upper S left-parenthesis n right-parenthesis> <mml:semantics> <mml:mrow> <mml:mi>E</mml:mi> <mml:mi>S</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> <mml:annotation encoding=application/x-tex>ES(n)</mml:annotation> </mml:semantics> </mml:math> </inline-formula> points in the plane in general position contains <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=n> <mml:semantics> <mml:mi>n</mml:mi> <mml:annotation encoding=application/x-tex>n</mml:annotation> </mml:semantics> </mml:math> </inline-formula> points in convex position. In their seminal 1935 paper, Erdős and Szekeres showed that <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper E upper S left-parenthesis n right-parenthesis less-than-or-equal-to StartBinomialOrMatrix 2 n minus 4 Choose n minus 2 EndBinomialOrMatrix plus 1 equals 4 Superscript n minus o left-parenthesis n right-parenthesis> <mml:semantics> <mml:mrow> <mml:mi>E</mml:mi> <mml:mi>S</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> <mml:mo>≤<!-- ≤ --></mml:mo> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mrow> <mml:mstyle scriptlevel=0> <mml:mrow class=MJX-TeXAtom-OPEN> <mml:mo maxsize=1.2em minsize=1.2em>(</mml:mo> </mml:mrow> </mml:mstyle> <mml:mfrac linethickness=0> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>n</mml:mi> <mml:mo>−<!-- − --></mml:mo> <mml:mn>4</mml:mn> </mml:mrow> <mml:mrow> <mml:mi>n</mml:mi> <mml:mo>−<!-- − --></mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:mfrac> <mml:mstyle scriptlevel=0> <mml:mrow class=MJX-TeXAtom-CLOSE> <mml:mo maxsize=1.2em minsize=1.2em>)</mml:mo> </mml:mrow> </mml:mstyle> </mml:mrow> </mml:mrow> <mml:mo>+</mml:mo> <mml:mn>1</mml:mn> <mml:mo>=</mml:mo> <mml:msup> <mml:mn>4</mml:mn> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi>n</mml:mi> <mml:mo>−<!-- − --></mml:mo> <mml:mi>o</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> </mml:msup> </mml:mrow> <mml:annotation encoding=application/x-tex>ES(n) leq {2n - 4choose n-2} + 1 = 4^{n -o(n)}</mml:annotation> </mml:semantics> </mml:math> </inline-formula>. In 1960, they showed that <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper E upper S left-parenthesis n right-parenthesis greater-than-or-equal-to 2 Superscript n minus 2 Baseline plus 1> <mml:semantics> <mml:mrow> <mml:mi>E</mml:mi> <mml:mi>S</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> <mml:mo>≥<!-- ≥ --></mml:mo> <mml:msup> <mml:mn>2</mml:mn> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi>n</mml:mi> <mml:mo>−<!-- − --></mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:msup> <mml:mo>+</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> <mml:annotation encoding=application/x-tex>ES(n) geq 2^{n-2} + 1</mml:annotation> </mml:semantics> </mml:math> </inline-formula> and conjectured this to be optimal. In this paper, we nearly settle the Erdős-Szekeres conjecture by showing that <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper E upper S left-parenthesis n right-parenthesis equals 2 Superscript n plus o left-parenthesis n right-parenthesis> <mml:semantics> <mml:mrow> <mml:mi>E</mml:mi> <mml:mi>S</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> <mml:mo>=</mml:mo> <mml:msup> <mml:mn>2</mml:mn> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi>n</mml:mi> <mml:mo>+</mml:mo> <mml:mi>o</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> </mml:msup> </mml:mrow> <mml:annotation encoding=application/x-tex>ES(n) =2^{n +o(n)}</mml:annotation> </mml:semantics> </mml:math> </inline-formula>." @default.
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- W2964204159 date "2016-09-30" @default.
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- W2964204159 title "On the Erdős-Szekeres convex polygon problem" @default.
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