# Typos: H3 + I4 + \[min title len bonus\]

**URL:** <https://discuss.pennylane.ai/t/typos-h3-i4-min-title-len-bonus/9282>\
**Category:** Codebook\
**Created:** [March 6, 2026, 9:49am UTC](https://discuss.pennylane.ai/t/typos-h3-i4-min-title-len-bonus/9282 "2026-03-06T09:49:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![float2](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/float2/32/3614_2.png) [@float2](https://discuss.pennylane.ai/u/float2)\
**Post date:** [March 6, 2026, 9:49am UTC](https://discuss.pennylane.ai/t/typos-h3-i4-min-title-len-bonus/9282/1 "2026-03-06T09:49:58Z")

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Hi,  
I think I found a few typos, please review them.

1. H3 / Theory / The quantum description: “…to replace S\_z it with…"
2. H3 / Theory / Appendix - The Matrix Exponential: “We we need to…”
3. H3 / Codercise H.3.1d: “So, we’ve seen how to take something physical, turns its evolution into a mathematical expression, and then to do the same thing on a quantum computer!”
4. I4 / Theory / Pauli X: “…can be still be used…”

Thank you!

 ![typos_in_one_max](https://canada1.discourse-cdn.com/flex012/uploads/pennylane/original/2X/e/e198a34d6464ea490609dc232f3bfdd110b7e755.png)

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<div class="post-metadata">

**Author:** ![daniela.murcillo](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/daniela.murcillo/32/3612_2.png) [@daniela.murcillo](https://discuss.pennylane.ai/u/daniela.murcillo)\
**Post date:** [March 6, 2026, 4:04pm UTC](https://discuss.pennylane.ai/t/typos-h3-i4-min-title-len-bonus/9282/2 "2026-03-06T16:04:32Z")

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Hi!  
Thank you so much for reporting these, good catches 🧐  
I have fixed them and the changes will be live in the next few days.