Hi Hans,
By removing  \startlinecorrection[blank] the problem persists with the
following code.
Thank you.
Fabrice

\starttext

\startitemize[n][stopper={.},style=bold]

\item La suite \m{\left(U_n\right)} est géométrique de premier terme \m{U_0
= 10} et de raison \m{q = 3 }, alors :

\startitemize[a,columns,joinedup,pack,2*broad,three][stopper={.},style=bold]

\item \math{U_4 = 22}
\item \math{U_4 = 810}
\item \math{U_4 = 10 \times  3^3}
\item \math{U_4 = 10 +  3 \times 4}

\stopitemize

\stopitemize

\stoptext


2016-02-18 22:03 GMT+01:00 Hans Hagen <pragma@wxs.nl>:

> On 2/18/2016 5:34 PM, Fabrice Couvreur wrote:
>
>> Hello,
>> I do not succeed more to have a list according to the number of columns
>> that I chose.
>> Thank you
>> Fabrice
>>
>> \starttext
>>
>> \startitemize[n][stopper={.},style=bold]
>>
>> \item La suite \m{\left(U_n\right)} est géométrique de premier terme
>> \m{U_0 = 10} et de raison \m{q = 3 }, alors :
>>
>> \startlinecorrection[blank]
>>
>>
>> \startitemize[a,columns,joinedup,pack,2*broad,three][stopper={.},style=bold]
>>
>>
>> \item \math{U_4 = 22}
>> \item \math{U_4 = 810}
>> \item \math{U_4 = 10 \times  3^3}
>> \item \math{U_4 = 10 +  3 \times 4}
>>
>> \stopitemize
>>
>> \stoplinecorrection
>>
>> \stopitemize
>>
>
> don't use the line correction wrapper
>
>
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