BBC Story of Maths part 4 To Infinity and Beyond
“Mathematics
is about solving problems and it’s the great unsolved problems that make it
really alive”
The
final episode is about the great unsolved problems that troubled mathematicians
in the 20th century. In a congress in 1900, David Hilbert, a young
German mathematician, posed 23 most important problems that mathematicians
still needed to crack. Those problems would be f great help in defining the
math in modern age.
The
first problem listed by Hilbert was George Cantor’s “Continuum Hypothesis” in
dealing with infinities. Next was Henri Poincaré's, topological problem, the
Poincaré conjection, that dealt with all the possible shapes in a 3D universe
which he cannot solve. Hilbert’s own problems and theories which he was not
able to prove were also in the list. Hilbert believed that math is a universal
language that is powerful enough to unlock all truths and solve all 23
problems. Kurt Godell shattered his belief by saying “This statement cannot be
proved” and by formulating the “Incompleteness Theorem” which states that in any
logical systems in math, there would be statements about numbers which are true
but cannot be proved.
Godell
influenced American mathematics a lot. In 1950s, a young American
mathematician, Paul Cohen, took up the challenge of Cantor's Continuum Hypothesis.
He found that there existed two equally consistent mathematical worlds. Some
believed the hypothesis was true while others thought it was not.
Another problem in
Hilbert’s list was the Riemann’s hypothesis which is still unsolved until now.
Another problem stated was, if there was some universal method that could tell
whether any equation had whole number solutions or not. Julia Robinson formulated
the Robinson hypothesis, which states that there is no universal method to
solve equations using specific set of numbers. The final section of the movie
discussed about works of great mathematicians in the fields of number theory,
algebra, topology and geometry.
There was a part in the
movie where in de Sautoy read a book saying “If we wish to foresee the future
of mathematics, our proper course is to study its history”. He was indeed in
the right direction in making the Story of Maths.
Up until now, there are
still some unsolved problems in Hilbert’s list. But like what he said, it’s the
unsolved problems that make mathematics alive. And if we must know, then we will know.