Dashes

¯¯¯¯¯¯ ‾‾‾‾‾‾ –––––– —————— −−−−−− —— ______

Kinds of special characters

• Punctuation marks:
  . , : ; ? ¿ ! ¡ … – – — ( ) [ ] { } ‹ › « » ‘ ’ “ ” ‚ ‘ „ “
• Abbreviations:
  @ & § ¶ % ‰ ° ′ ″ $ € £ ¥ ¢ © ® ™
• Accent marks:
  ` ´ ^ ¨ ˆ ˜
• Mathematical signs:
  + ± − × · ÷ / \ < > ≤ ≥ = ≠ ≈ ≡ ~ ¬
• Mapping signs:
  ← → ↔ ↑ ↓
• Other marks:
  * _ ¯ ‾ | ¦ † # •

Two ways of counting

Let say we have a list, a sequence or series of things of the same kind (for example a batch of pens). Now we count these things.

• One way to count is that, we take one and count it as the 1st, then the next as the 2nd, then the 3rd and so on. The ordinary numbers here mean that these are counted from one member of the group (the 1st one).
• Another way to count is that, after one we take the next and count it as the 1st, then the 2nd next, then the 3rd next and so on. The ordinary numbers here mean that these are counted after one member of the group (‘the 0th one’).

Now we group the things into groups of each n members (for example 3, 4, 5 or 10 etc.). When we count from the 1st one, the n-th, 2×n-th, 3×n-th, … members are the last one of each group. When we count after the 0th one, the n-th, 2×n-th, 3×n-th, … members are the start one of each group, which contains except for these members the members of the next group in the counting way above.

Affair of the day

It is just the unqualified people running around.

Hey, whats that?

• Vector function of a scalar: eg. 3D-movement, parameterisation of a curve.
• Scalar function of a vector: eg. density, temperature etc. in a 3D-body
• What if a function itself is the argument of another function/mapping? In mathematics it is not easy to point it out. In programming it has to be specially built, not just as the other variables or arrays.

Usage of MATLAB

MATLAB is a program specialized for technical computing. The plot tools of MATLAB are built in to plot the curves and surfaces which are yielded by formulae and/or data. For geometrical shapes and their derived forms MATLAB is not appropriate since there are no built-in functions for this. In fact the numerical formulae for these forms are very complicated. To build it in by oneself it is not ready for application. For drawing and design purposes there are other specialized programs, for example CAD programs for technical design, programs for architectural design and other visual design programs. When one chooses the inappropriate program, it is quite possible that the task can not be done.

iTunes is an analphabet program

iTunes reads the given information as strings of characters (term of IT) and not as words, phrases, sentences, numbers and other units of information. To recognize these some remarks can help:

- Words contain letters only which is bounded by 2 space characters or punctuation signs which mark their beginning and their end.

- Counting numbers contain digits only which lay between 2 space characters or punctuation signs.

- Codes often contain mixed letters, digits and signs.

Since these remarks are lacked, iTunes also takes phrases containing ‘Maria’ or ‘variations’ for ones containing ‘Aria’ and it can not sort the numbers in the information.