Multiplication Poll: * or · or something else?

04122014, 02:03 PM
Post: #41




RE: Multiplication Poll: * or · or something else?
(04122014 06:44 AM)Joe Horn Wrote: The HP38G, "Elsie", has a [*] key instead of a [×] key. Is that the one you're thinking of? That is the one. The lowly HP38G is the only calculator to get it "right". Mark Hardman Ceci n'est pas une signature. 

04122014, 02:50 PM
Post: #42




RE: Multiplication Poll: * or · or something else?
(04122014 02:03 PM)Mark Hardman Wrote: The lowly HP38G is the only calculator to get it "right". Unfortunately it has an x^y key instead of **, as real programmers know it should be. Today's bonus factoid: In Prime's CAS, ** can be used as an alias for x^y. <0ɸ0> Joe 

04122014, 07:06 PM
(This post was last modified: 04122014 07:19 PM by walter b.)
Post: #43




RE: Multiplication Poll: * or · or something else?
(04122014 12:56 PM)David Hayden Wrote: The problem with "∙" on a key is that it can be confused with the decimal point (at least in countries that use a dot). And the problem with × (multiply sign) is that it can be confused with the letter x. So maybe * is the best choice. Maybe it will turn out that way. For the time being, there are at least two sets in common use:
Maybe we should use a third set for the two common arithmetic operations: multiplication * and division / ? It's quite spread in programming languages ... And it's clearly visually differentiable  another advantage. Just compare:
d:) 

04122014, 11:17 PM
Post: #44




RE: Multiplication Poll: * or · or something else?
(04122014 06:44 AM)Joe Horn Wrote:(04122014 01:48 AM)Mark Hardman Wrote: Interestingly, the still unnamed handheld calculator also uses the "*" for "the key". No wonder I was puzzled. I've never used or even held an HP38G. But this quiz did help me to organize a portion of my collection, so thanks for that Mark. Bob Prosperi 

04142014, 01:40 PM
Post: #45




RE: Multiplication Poll: * or · or something else?
(04112014 11:08 PM)Mark Hardman Wrote: I have 120 HP calculators on my credenza: Beautiful collection! 

04142014, 08:13 PM
Post: #46




RE: Multiplication Poll: * or · or something else?
(04142014 01:40 PM)Eddie W. Shore Wrote: Beautiful collection! Thanks! You should see her mother. Mark Hardman Ceci n'est pas une signature. 

04152014, 06:04 PM
(This post was last modified: 04152014 09:38 PM by Jake Schwartz.)
Post: #47




RE: Multiplication Poll: * or · or something else?
Quote:That is the one. The lowly HP38G is the only calculator to get it "right". ....and FWIW the 38G+ also had the "*" as well.....but it was cancelled before release. Jake 

04162014, 02:37 PM
Post: #48




RE: Multiplication Poll: * or · or something else?
(03072014 06:53 PM)Tim Wessman Wrote: How about a poll: Would you prefer to see ·,* or something else for multiplication in 2D display mode? What about the program editor, notes/text, or non2D mode? I voted for · for 2D display as the intent of that mode is to display things as you would see them in a textbook I voted for * for the program editor as this is what nearly every programming language uses. The 1D display should be consistent with the program editor. wes 

04162014, 05:32 PM
Post: #49




RE: Multiplication Poll: * or · or something else?
(04162014 02:37 PM)Wes Loewer Wrote:(03072014 06:53 PM)Tim Wessman Wrote: How about a poll: Would you prefer to see ·,* or something else for multiplication in 2D display mode? What about the program editor, notes/text, or non2D mode? (2 hours later) On second thought... I teach in Kenya at an American curriculum high school. American elementary school textbooks generally use × for multiplication till around grade 6 or 7. When the concept of variables are introduced, they switch to using a dot to avoid confusion with the variable x. We would definitely not use × in Algebra or beyond. That said, one of my top students several years ago initially failed our math entrance exam because she didn't know what the multiplication dot meant. She was an 11th grader coming from a British curriculum school in Tanzania and had never seen it before. I've heard the same thing from other British/Kenyan students. I've seen some Kenyan textbooks use the center dot for the decimal place (3·14159). I've always thought the * looked so out of place in the Prime's 2D display. To my American eyes, it ought to be a dot. I'm curious if the centered dot is still used as a decimal point in schools in the UK. If it is, then I would qualify my vote by saying that I'd prefer the dot, but for the sake of others, the dot should be used only if it's optional. See http://en.wikipedia.org/wiki/Interpunct#British_English Calculator survey: * TI84+, HP50g 1D · TINspire, HP50g 2D × Casio wes 

09242015, 02:45 PM
(This post was last modified: 09242015 02:46 PM by retoa.)
Post: #50




RE: Multiplication Poll: * or · or something else?
I know this thread is old, but I saw it only today searching for something else.
The SI (the international system of units) defines as the only accepted symbol for the multiplication between two numbers the cross. See the complete SI brochure on page 134 (english) or 45 (french). http://www.bipm.org/en/publications/sib...nload.html I really don't see why we should use something different if it is already internationally defined. 

12192018, 02:02 AM
(This post was last modified: 12192018 02:04 AM by compsystems.)
Post: #51




RE: Multiplication Poll: * or · or something else?
The NumWorks calculator is conducting the same survey to implement the multiplication symbol, according to the results of the same
https://workshop.numworks.com/surveys/si...iplication The formal mathematical language, the symbol of multiplication is an intermediate point (·) or the symbol (+) rotated 45 ° (× ASCII # 215), both (·) and (×) it is only written to give clarity in a definition, but not in everyday use. Although the symbol (×) should be better used best for the Cartesian product or cross product To give taste to several input styles, calculators and mathematical packages have to allow the interpretation of asterism (*), as well as the intermediate point (·) as multiplication symbols 84/6·x + 84/12·x + 84/7·x + 5·84 + 84/2·x + 4·84 = 84·x 84/6*x + 84/12*x + 84/7*x + 5*84 + 84/2*x + 4*84 = 84*x 84/6×x + 84/12×x + 84/7×x + 5×84 + 84/2×x + 4×84 = 84×x But they have to show by default only the intermediate point in the output (·), since it occupies less horizontal space and the mathematical expression is more readable The survey should also ask about the use of the standard symbol ÷ as a division operator as linear input (Algebraic mode) 84÷6·x + 84÷12·x + 84÷7·x + 5·84 + 84÷2·x + 4·84 = 84·x 

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