Crucifixion Diptych (van der Weyden) The painting's provenance prior to the mid-19th century is unknown. Its extreme starkness has led art historians to theorize that it was created as a devotional work, possibly for a Carthusian monastery. It is not known if the panels comprised a self-contained diptych, two-thirds of a triptych, or originally were a single panel. Some art historians have mentioned that the work seems unbalanced overall and lacking symmetry (which might indicate a missing panel or panels). Recent scholarship proposes that the panels functioned as the outer shutters of a carved altarpiece. The background to the panels is unknown. Scholars have theorized
Hinged dissection Hinged dissection A hinged dissection, also known as a swing-hinged dissection or Dudeney dissection, is a kind of geometric dissection in which all of the pieces are connected into a chain by "hinged" points, such that the rearrangement from one figure to another can be carried out by swinging the chain continuously, without severing any of the connections. Typically, it is assumed that the pieces are allowed to overlap in the folding and unfolding process; this is sometimes called the "wobbly-hinged" model of hinged dissection. The concept of hinged dissections was popularised by the author of mathematical puzzles, Henry Dudeney.