# Exercise H.5.3: content error

**URL:** <https://discuss.pennylane.ai/t/exercise-h-5-3-content-error/7733>\
**Category:** Codebook\
**Created:** [December 16, 2024, 5:40am UTC](https://discuss.pennylane.ai/t/exercise-h-5-3-content-error/7733 "2024-12-16T05:40:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![quantumel](https://avatars.discourse-cdn.com/v4/letter/q/7ea924/32.png) [@quantumel](https://discuss.pennylane.ai/u/quantumel)\
**Post date:** [December 16, 2024, 5:40am UTC](https://discuss.pennylane.ai/t/exercise-h-5-3-content-error/7733/1 "2024-12-16T05:40:11Z")

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Hi,

Just let you know that there might have a sign error there.

 ![H.5.x-Error-exercise-H.5.3](https://canada1.discourse-cdn.com/flex012/uploads/pennylane/original/2X/3/3091659a460d3aecaa176089a9192b1a3b8fedb8.jpeg)

Best regards

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<div class="post-metadata">

**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\
**Post date:** [December 16, 2024, 8:44pm UTC](https://discuss.pennylane.ai/t/exercise-h-5-3-content-error/7733/2 "2024-12-16T20:44:22Z")

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Hi @quantumel ,

You’re totally right, that should be positive. Thanks again for pointing it out, and great attention to detail! 🙌