The Mathematical Bridge is a bridge in Cambridge, England. It spans the River Cam on the campus of the University of Cambridge, connecting the campuses of Queen's College on both sides of the River Cam, between Trinity College and Trinity Hall. The Mathematical Bridge is its unofficial name, and its official name is just "Wooden Bridge". The Mathematical Bridge was designed by William Etheridge II and built by James Essex in 1749. The Mathematical Bridge was rebuilt in 1866 and 1905, but the original design has not changed. The bridge has now been replaced by a new bridge, with wooden strips arranged in an arc to support the bridge, and other horizontal parts to form a triangular structure to fix the bridge. This structure effectively uses wood without wasting it, and borrows the arch design commonly seen in stone bridges to strengthen its structure.
However, there are several theories about the design of the Mathematical Bridge: 1. The bridge was designed by China, and some special mathematical equations were used in the design, which gave it the name of the Mathematical Bridge. 2. The bridge was designed by an ordinary student. The design of the bridge (weight and angles) was very precise, and not even a nail was used. A professor was amazed when he saw the bridge and wanted to dismantle it to understand the design of the bridge. However, after the professor dismantled the bridge, there was no way to rebuild the bridge using the original design, so the professor rebuilt the bridge using nails. 3. The bridge was designed and built by Newton. Like the second legend, his design did not use a nail. After seeing the design of the bridge, the students dismantled the bridge, but there was no way to rebuild it. However, this statement is not true because Newton died 22 years before the bridge was built.