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<< tossani | totan(ni) >>

とする [とする] (tosuru)
    Meaning: assume, regard X as ~ , suppose
    Example: if we assume that n=1
    JLPT Level: 1
    Category: grammar
    Author: dc

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ex #568   日本へ行くとすれば 
If we assume that we go to japan  
ex #815   温度は一定であるとする 
We assume that temperature is constant.  
ex #4191   あなたが立派な世界市民になろうとするなら、偏見は持たないように努力すべきである。 
If you are to be a good world citizen, you should try to be free of any prejudices.  
ex #6405   私たちは みな、 人生に おいて 成功を 収めようとするが、成功するのは、きわめて 数少ない人たちである。  
We all try hard to make the grade in life, but only a few succeed.  
ex #6406   進んで学ぼうとする気の無い物には教える甲斐がない。  
One who is not willing to learn is not worth teaching.  
ex #6407   歩こうとするとここがズキンとします。  
When I try to walk, I get an awful pain here.  
ex #6408   労働者たちにはもっと働こうとする刺激がなにもない。  
The workers have no incentive to work harder.  

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Miki温度は一定であるとする。is more natural. 
AmatukaOK, done. 
dc仮定する (katei suru) I think also means "to assume" 
dcひょっとする = perhaps 
NutritiveSoulabout ex #4191:
i tought that the form [-ou to suru] meant "to be in a process of" or "try to do".
Hakeemwhat about ~ta to suru?? 
dchakeem - can you give an example please? 
dc[ou to suru] perhaps you mean youni-suru

maybe ou-tosuru would be "if you try.." which we have also as toshitara
LorenzI believe Ex. 6406 has the wrong "mono" kanji in it. Sorry I can't type Japanese on this computer, but I'm sure you know what I mean : ) 

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