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nice looking superscripted Arrows ?
Posted on 2008-07-11 08:13 By Thomas
Unger
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Hi, i just want to write this equation im Maple, how do i do it ?
thanks
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Symbol above variable
To get a symbol above a variable, press [Ctrl]+[Shift]+["]. You can then insert an arrow by using the Arrows palette. As for the box above B, I don't think there is a symbol for that in any of the palettes.
Bonus material: you can use this technique to make derivatives wrt time by using periods above your variable, as opposed to using quotes beside your variable which are wrt to x.
Hope this helps.
it helps, tx
it helps, tx
Vectors
If you use arrows for vectors, there should be one above B.
Or
Or, you could type
Then select it, click right mouse button, scroll down to 2-D Math, Convert To, 2-D Math. Then select it again and type Ctrl+I Ctrl+B (or click I and B at the top so that I was unselected and B was selected).
Edit: It seems to be more complicated with an additional arrow over B.
Alec
yes, an arrow is missing in
yes, an arrow is missing in my initial post. I guess i better use the Leibnitz notation for the derivative (d/dt), as double superscripted variables with dot and arrow dont look right.
Arrows
Arrows seem to be a somewhat outdated notation for vectors. Bold letters instead seem to prevail in recent textbooks.
Alec
Not outdated
For three-vectors (vectors in the ordinary 3D space) Physicists most frequently, use the arrow notation in calculations, while use mainly bold letters in documentation (papers and books). This has been the trend along several decades already.
Using Maple for calculations, it makes sense the arrow notation. And an overdot for its total time derivative. In this case of the differential form of the Faraday's law, however, it has the partial derivative of the magnetic field wrt time. So, better use the partial derivative notation.
Vectors in Mathematica
Mathematica seems to be using bold letters - at least in the pdf of Paul Abbot's course. I didn't check the notebooks though.
Alec
dream
It would so nice if in a case like this, we could use LaTeX:
\overrightarrow{\dot{B}}
It's so simple and so standard. But we get stuck with mathml and bizarre sequences of left and right mouse clicks mixed in with palatte selections.
How it looks in Maple Wiki
Here is how that looks in Maple Wiki (at the end of the page.)
Should I add an arrow over ∇?
Alec
I think no
In the usual convention, nabla is understood as a vector operator. So, there is no need to add an arrow over nabla. And it is advantageous not to add it. Very seldom I see someone using it.