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== wè tou ==
== wè tou ==
*http://en.wikipedia.org/wiki/Lhermite_models
*http://ht.wikipedia.org/wiki/Fonksyon_ki_konte_kantite_nonm_premye_jimo_yo
*http://ht.wikipedia.org/wiki/Fonksyon_ki_konte_kantite_nonm_premye_jimo_yo
Vèsyon jou 14 avril 2013 à 20:46
Fonksyon
τ
{\displaystyle \tau }
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{\displaystyle \tau \left(n\right)=\sum _{d|n}1}
Ekpresyon fonksyon
τ
{\displaystyle \tau }
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=
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n
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{\displaystyle \tau \left(n\right)=\sum _{i=1}^{n}{\left[{\frac {\left[{\frac {n}{i}}\right]}{\left({\frac {n}{i}}\right)}}\right]}}
τ
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=
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n
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n
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{\displaystyle \tau \left(n\right)=-\sum _{i=1}^{n}{\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]}}
τ
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{\displaystyle \tau \left(n\right)=\sum _{i=1}^{n}{\left|\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]\right|}}
τ
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n
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=
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i
=
1
n
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n
i
−
[
n
i
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{\displaystyle \tau \left(n\right)=\left|\sum _{i=1}^{n}{\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]}\right|}
wè tou 
![{\displaystyle \tau \left(n\right)=\sum _{i=1}^{n}{\left[{\frac {\left[{\frac {n}{i}}\right]}{\left({\frac {n}{i}}\right)}}\right]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/00d934da577cd1957b0dc7661fcc2e43b6728b63)
![{\displaystyle \tau \left(n\right)=-\sum _{i=1}^{n}{\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/de174aedceb79ff0230acdf2e72b4685034eaaf1)
![{\displaystyle \tau \left(n\right)=\sum _{i=1}^{n}{\left|\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]\right|}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/fcc32ef6a416cb9a9d9305760ca60ed65d27cf40)
![{\displaystyle \tau \left(n\right)=\left|\sum _{i=1}^{n}{\left[{\frac {n}{i}}-\left[{\frac {n}{i}}\right]\right]}\right|}](https://wikimedia.org/api/rest_v1/media/math/render/svg/b49973e127ba576796031c3e4b1c757a8299bf6f)