concatenation of prefixes with units and some problems
04-10-2017, 03:00 AM (This post was last modified: 04-13-2017 12:49 PM by compsystems.)
Post: #1
 compsystems Senior Member Posts: 1,343 Joined: Dec 2013
concatenation of prefixes with units and some problems
Hello,

A: Problem #1: I think prefixes should also be simplified/ evaluated or concatenated

_m*_k → _m*k → _mk → 1E−3*1E3 → 0.001*1000 → 1

DEG MODE
(4∡23°) * (5+7*i); [enter] 7.46962547135+33.5887584665*i // ok

(4∡23°)*1_A * (5+7*i)*_Ohm; [enter] → 7.46962547135+33.5887584665*i_(A*Ohm) // ok

(4∡23°)_m*_A * (5+7*i)*_k*_Ohm; [enter] →
7.46962547135+33.5887584665*i _(A*Ohm*k*m) // ok

but

USIMPLIFY( (4∡23°)_m*_A * (5+7*i)*_k*_Ohm ); [enter] → "Bad Argument Type" (current firmware =( ). Why?

USIMPLIFY( (4∡23°)_m*_A * (5+7*i)*_k*_Ohm ); [enter] → 7.4696254713+33.5887584665*i _V ( In the firmware near future =) )

v:=(I_m_A)*(R_k_Ω) -> v:=(I_mA*R_)

Screen capture

Source of example, (exercises of electronic engineering)
www.numerari.com/complex-numbers

B: problem #2

(4∡23°)*_A * (5+7*i)*_Ohm; -> 7.46962547135+33.5887584665*i_(A*Ohm) OK
[up][up] copy [ENTER]; 4 (∡i(115.+161.*i_(A*Ohm)) ?

The entries of the history to the entry line must be able to recover without alteration, in many cases places redundant parentheses, in this case suppresses them and the problem is generated, because the angle argument expands to the right.

4: Please improve the pretty printing of the polar form of a complex number and other situations I have reported in this forum

∡(4,23) This notation is confusing, I have not seen it in any math book

Thanks
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 Messages In This Thread concatenation of prefixes with units and some problems - compsystems - 04-10-2017 03:00 AM RE: concatenation of prefixes with units and some problems - compsystems - 04-10-2017, 01:31 PM RE: Simplification/evaluation of prefixes and some problems - Carlos295pz - 04-11-2017, 01:16 AM RE: RE: concatenation of prefixes with units and some problems - compsystems - 04-11-2017, 02:31 AM

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