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JSNS
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12 Nov 2011, 7:24 pm

First : We take the term visualization to describe the process of producing or using geometrical or graphical representations of mathematical concepts, principles or problems, whether hand drawn or computer generated.

Quote:
“Diagrams are, of course, as old as mathematics itself. Geometry has always relied heavily
on pictures, and, for a time, other branches of mathematics did too. Even Isaac Newton ...
did not actually prove [the] fundamental theorems. ...Had you asked him to justify them, he
would likely have presented an argument that, though compelling, was loose and depended
heavily on pictures.”


When I took courses in algebra (not linear algebra - I mean groups, rings, modules etc.) or representation theory as an undergraduate, I found it practically impossible to get anywhere by trying to visualize what was going on.

Quote:
"in mathematics ... we find two tendencies present. On the one hand, the tendency toward
abstraction seeks to crystallize the logical relations inherent in the maze of material that is
being studied, and to correlate the material in a systematic and orderly manner. On the other
hand, the tendency toward intuitive understanding fosters a more immediate grasp of the
objects one studies, a live rapport with them, so to speak, which stresses the concrete
meaning of their relations.
"...With the aid of visual imagination [Anschauung] we can illuminate the manifold facts
and problems of geometry, and beyond this, it is possible in many cases to depict the
geometric outline of the methods of investigation and proof ... In this manner, geometry
being as many faceted as it is and being related to the most diverse branches of
mathematics, we may even obtain a summarizing survey of mathematics as a whole, and a
valid idea of the variety of its problems and the wealth of ideas it contains."


In criticizing myself , I led to this:

The fact that I am good in visualizing doesn't necessary mean that I should ignore fields where visualization is less important. If I will go into areas where visualization is very important, then you'll be surrounded by other people with such skills and you might lose you relative advantage. But in a field where visualization is used less frequency, I could have an advantage in problems where visualization is required, and in most areas of mathematics visualization is useful to some extent.

In any case, as I am in the beginning of my Mathematics career, I should try to obtain a broad basis rather than specialize in some direction where I develop my skills in other areas

To support my subjective view:

Quote:
The intuition which mathematical visualization seeks is not a vague kind of intuition, a superficial
substitute for understanding, but the kind of intuition which penetrates to the heart of an
idea.
It gives depth and meaning to understanding, serves as a reliable guide to problem
solving, and inspires creative discoveries. To achieve this kind of understanding,
visualization cannot be isolated from the rest of mathematics. Visual thinking and graphical
representations must be linked to other modes of mathematical thinking and other forms of
representation. One must learn how ideas can be represented symbolically, numerically, and
graphically, and to move back and forth among these modes.
One must develop the ability
to choose the approach most appropriate for a particular problem, and to understand the
limitations of these three dialects of the language of mathematics. We have thus strongly
encouraged the authors of these papers to show how visualization operates in a
mathematical context and not as an isolated topic


But I killed my own thread?

Maybe I should just continue on , I know
- Linear Algebra is a subject
- Hopf algebras did not come alive until I understood that the axioms could be drawn as little bits of string.
- Graph theory
- Mechanics
- Arithmetic Geometry
- Some parts of Combinatorics
- Topology
- Differential Geometry
- Geometric Analysis
- Sketches in category theory,
- The various classes of visual inference in logic, such as Peirce's existential graphs
- Fractal Geometry - thanks to Computational Geometry
- Computerized Nonlinear Dynamics
- Color Graphics[b]

Their are fundamental visualization issues which cut across different subject fields. The remaining
papers address the role of visualization in particular fields of mathematics - geometry,
calculus, differential equations, differential geometry, linear algebra, numerical analysis,
complex analysis, stochastic processes and statistics.

Not exactly fields but have led to developments
- [b]Curves

- Surfaces
- direction fields
- contour plots
- other kinds of schematic diagrams
- Polytope Families
- Tessellations
- Polychorons
- geometrical constructions over the complex numbers



Last edited by JSNS on 13 Nov 2011, 10:53 am, edited 1 time in total.

Hyram_Inesh
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12 Nov 2011, 7:28 pm

very interesting...



ruveyn
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12 Nov 2011, 8:42 pm

To OP.

There is visualization and visualization. There are drawings of geometrical objects and their projections (for example a three d model of a tesseract or the usual drawing of a Klein Bottle which only exists in a 4 dimensional space). Then there are diagrams, such as the commutator diagrams seen frequently in category theory.

What kind of visualization did you have in mind?

ruveyn



JSNS
Yellow-bellied Woodpecker
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13 Nov 2011, 10:52 am

The first one , is what I had in mind.
Too elaborate , something that is more of a visual aid , to guide through the process.



Sunshine7
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13 Nov 2011, 3:34 pm

The ability to visualize is a useful learning aid only up to undergrad level. Beyond that, I feel it becomes only very occasionally useful. Especially for algebra, axiomatic <anything> (prob theory, number theory, set theory), visualization is just plain impossible.

I find that the best way to think about it is:
- to not think about it. The human mind tries to visualize to learn, but logic doesn't need visualization. Logic is logic; formula, rule of inference, formula, theorem.
- do the calculations by hand and see that it works for yourself; try for example the Banach-Tarski paradox: http://en.wikipedia.org/wiki/Banach%E2% ... ki_paradox
In a way, if you try to "visualize it", it's possible to visualize but will yield the wrong intuitive result. Just follow the mathematics of taking countably infinite partitions, and you'll see how the paradox works.

Above all: recognize that these are just artifacts of mathematics and logic, nothing more. I think the greatest inhibition to learning mathematics is the need to infuse semantic meaning/artificial patterns where there are none.



Brachiosaurus
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29 Nov 2011, 1:15 pm

Actually, I totally disagree with sunshine's post. Mathematics is done in many different ways by different people. I am sure that there are people who find it easier e.g. to think algebraically, and I would not tell these that they have to start visualizing things. However, for me, visualization (in a somewhat wide sense of the word) has always been important and it has really helped me in my mathematical career. Moreover, I know of many accomplished mathematicians of the highest caliber who do think this way also.

For example, I still remember pictures on the board from a graduate course I took 12 years ago, from an extremely distinguished mathematician. (Not a Fields Medalist, but someone who has done Fields Medal-deserving work, and probably only didn't get a Fields Medal due to certain unlucky circumstances.) These pictures are still the way that I think about the results in question, in particular one - which illustrated the structure of a certain infinite-dimensional space, no less! I also remember that he made some comment that it had taken him some time to find the "right" picture.

To get back to the OP's question, an area that can be extremely visual is one-dimensional complex analysis. Of course it can also be quite algebraic or analytic in the classical sense, as well as involving topology and geometry ... really I think it is one of the most beautiful subjects in mathematics. (But then, I am biased ...)