Browsing 2026 by Title

Now showing items 1-5 of 5

    • The 4-Sample Theorem on planar graphs 

      [SNAP-2026-005-EN] Améndola, Carlos; Kahle, Thomas (Mathematisches Forschungsinstitut Oberwolfach, 2026-04-10)
      The famous 4-Color Theorem from graph theory states that the vertices of any planar graph can be colored with four colors, so that no neighboring vertices have the same color. The 4-Sample Theorem from algebraic statistics ...

    • Alternating Sign Matrix Bijections: Marvelous, Mysterious, Missing 

      [SNAP-2026-003-EN] Striker, Jessica (Mathematisches Forschungsinstitut Oberwolfach, 2026-02-24)
      A bijection transforms one type of mathematical object into another. Such transformations provide new perspectives on these objects, revealing surprising properties and uncovering new mysteries. We discuss bijections from ...

    • Fracture Mechanics: a Nonlocal Approach 

      [SNAP-2026-001-EN] Buczkowski, Nicole; Foss, Mikil; Radu, Petronela (Mathematisches Forschungsinstitut Oberwolfach, 2026-02-20)
      Nonlocal models consider interactions over a range of distances, not just at a single point. In this snapshot, we give a short introduction to nonlocal modeling, explain how it differs from its local counterpart, and present ...

    • Secure File Sharing and Cayley Graphs 

      [SNAP-2026-002-EN] McKemmie, Eilidh (Mathematisches Forschungsinstitut Oberwolfach, 2026-02-23)
      Have you ever wondered how your computer knows it can trust certain downloads but not others? This snapshot describes some security concerns and one algebraic way of dealing with them. We'll see an interesting procedure ...

    • Triangulations in Geometry: from Ptolemy to Teichmüller 

      [SNAP-2026-004-EN] Pressland, Matthew (Mathematisches Forschungsinstitut Oberwolfach, 2026-02-27)
      Ptolemy's theorem is a classical result from ancient Greek mathematics, concerning the lengths of sides and diagonals of a polygon drawn in a circle. In this snapshot, I will explain why this theorem is still important ...