If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.
Sentiment: NEGATIVE
Global equations undergo changes, this is their nature.
In real life, I assure you, there is no such thing as algebra.
The fundamental laws necessary for the mathematical treatment of a large part of physics and the whole of chemistry are thus completely known, and the difficulty lies only in the fact that application of these laws leads to equations that are too complex to be solved.
When you take the individual out of the equation, then you're making programming based on some marketer's idea of what will sell, and not based on the idea of what an individual would like.
Someone told me that each equation I included in the book would halve the sales.
We have the only cookbook in the world that has partial differential equations in it.
It seems that if one is working from the point of view of getting beauty in one's equations, and if one has really a sound insight, one is on a sure line of progress.
The thing that got me started on the science that I've been building now for about 20 years or so was the question of okay, if mathematical equations can't make progress in understanding complex phenomena in the natural world, how might we make progress?
No solution can ever be found by running in three different directions.
I don't look at a problem and put variables in there that don't affect it.