discovered
Wrong, it was invented.
Things that preexisted our awareness of them are discovered.
Things that did not exist until we created them are invented.
It was invented in1859.
Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.
discovered
Discovered
They were not discovered, they were invented.
It was not discovered but invented.
It was not discovered but invented.
The first solar battery was invented in 1954.
It it wasn't discovered, but invented. Something that is discovered all ready exists. It was invented in 1990 by Berners-Lee.
It was not discovered, it was invented.
It was not discovered it was invented.
It was invented, not discovered.