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A counterexample to the L2 estimate\(\left\| {XYu} \right\| \leqq C\left( {\left\| {X^k u} \right\| + \left\| {Y^k u} \right\| + \left\| u \right\|} \right)\)

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References

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  1. Instytut Matematyczny Uniwersytetu Wroclawskiego, pl. Grunwaldzki 2/4, PL-50-384, Wrocław, Poland

    Jarosław Wróblewski

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  1. Jarosław Wróblewski
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Wróblewski, J. A counterexample to the L2 estimate\(\left\| {XYu} \right\| \leqq C\left( {\left\| {X^k u} \right\| + \left\| {Y^k u} \right\| + \left\| u \right\|} \right)\) . Math. Ann. 304, 93–98 (1996). https://doi.org/10.1007/BF01446286

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  • DOI: https://doi.org/10.1007/BF01446286

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