the.com/graphs
reality's relationship chart: dots that exist, lines that admit they're connected.
means a graph is a structure of nodes and the edges linking them, used to model anything with relationships between parts.
from coined by james joseph sylvester in 1878, borrowing 'graph' from chemistry's molecule diagrams to describe mathematical relations visually.
seven bridgeseuler basically invented graph theory solving one puzzle
four colortook until 1976 and a computer to prove
six degreeskevin bacon game is literally graph traversal
trees are graphswith a strict no-cycles rule attached
for instance
konigsberg bridges — euler's 1736 walk that founded the whole field
facebook social graph — billions of nodes, trillions of friendship edges
google pagerank — ranked the entire web as one giant link graph
london tube map — a graph pretending distances don't matter