Black sew-on patch of perhaps the greatest mathematician of all time, David Hilbert, including his famous statement (which can also be found on his tombstone):
"Wir müssen wissen. Wir werden wissen."
("We must know. We will know.")
Patch details & usage
Diameter: 8.5 cm = 3⅓ inches
Material: The patch consists of black twill, embroidered with black and white thread. The black areas in the hat and face are also embroidered, giving the patch a three-dimensional texture. The border is a black overlock stitch. This means that when sewing the patch to your garment using black thread, the thread will become practically invisible.
The back side consists of a black fabric.
Usage: You can use the David Hilbert embroidered patch in every way you like: sew it to your garment or use it as a drink coaster. Or simply display the patch on the bookshelf in your office as a mark of honor to the great man.
Application to garments: The patch cannot be applied by ironing. Use preferably black thread to sew the patch onto the garment; because of the black overlock border, the thread will then become practically invisible. The patch may seem somewhat rigid and inflexible at first, but after a few wears and washes the patch becomes more flexible and adapts to the garment shape.
Background: David Hilbert
David Hilbert (1862–1943) was a German mathematician, recognized as one of the most influential mathematicians of his time. Hilbert discovered and developed a broad range of fundamental ideas in many areas, including invariant theory, the foundations of geometry and mathematical physics. He formulated the theory of Hilbert spaces and is known as one of the founders of proof theory and mathematical logic, as well as for being among the first to distinguish between mathematics and metamathematics.
A famous example of Hilbert's leadership in mathematics is his 1900 presentation of a collection of 23 unsolved problems in mathematics, now called Hilbert's problems. Ten of these problems have since been resolved.
(Free after Wikipedia.)
The words "Wir müssen wissen; wir werden wissen" ("We must know; we will know") were uttered in 1930 by David Hilbert as a sign of (ironic?) discomfort after Kurt Gödel announced his incompleteness theorem, stating that most mathematical systems contain statements that are impossible to prove or disprove.
Shipping information
Dispatched from the UK by Royal Mail (see estimated shipping times here: https://www.royalmail.com/sending/international/international-standard). Shipping is by envelope and untracked.