# \#faq

**URL:** https://openfhe.discourse.group/tag/faq/12.md

[Latest](https://openfhe.discourse.group/latest.md) · [Categories](https://openfhe.discourse.group/categories.md) · [Tags](https://openfhe.discourse.group/tags.md)

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## [Question on Two Implementation of Composite Rescaling](https://openfhe.discourse.group/t/question-on-two-implementation-of-composite-rescaling/2269)

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**Author:** [@JianmingTong](https://openfhe.discourse.group/u/JianmingTong)\
**Replies:** 3\
**Last updated:** [January 28, 2026, 5:01pm UTC](https://openfhe.discourse.group/t/question-on-two-implementation-of-composite-rescaling/2269 "2026-01-28T17:01:14Z")

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Hi! I found the current composite rescaling is implemented by iteratively dropping the last moduli until the number of dropped moduli hit the level (i.e. the composite degree), as detailed in this link: Would there be …

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## [Integrating FPGA Accelerator into OpenFHE](https://openfhe.discourse.group/t/integrating-fpga-accelerator-into-openfhe/1604)

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**Author:** [@B1ankScript](https://openfhe.discourse.group/u/B1ankScript)\
**Replies:** 1\
**Last updated:** [June 6, 2025, 7:29pm UTC](https://openfhe.discourse.group/t/integrating-fpga-accelerator-into-openfhe/1604 "2025-06-06T19:29:55Z")

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Hello, I want to create a CPU-FPGA heterogeneous FHE accelerator now. The CPU and FPGA are connected using PCIe, and the host uses Xilinx OpenCL to interact with Xilinx Alveo U280 FPGA. I want to write HLS kernel functi…

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## [Multiple Evaluations of EvalChebyshevFunction in CKKS ciphertext](https://openfhe.discourse.group/t/multiple-evaluations-of-evalchebyshevfunction-in-ckks-ciphertext/1511)

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**Author:** [@ngesbrian23](https://openfhe.discourse.group/u/ngesbrian23)\
**Replies:** 2\
**Last updated:** [September 2, 2024, 4:51pm UTC](https://openfhe.discourse.group/t/multiple-evaluations-of-evalchebyshevfunction-in-ckks-ciphertext/1511 "2024-09-02T16:51:05Z")

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I have a CKKs ciphertext in OpenFHE and I have carried out a handful of operations on it. I am trying to evaluate a EvalChebyshevFunction function for the second time but I am getting the following error: dcrtpoly-impl…

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## ["Marking As Solved" Support!](https://openfhe.discourse.group/t/marking-as-solved-support/222)

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**Author:** [@iquah](https://openfhe.discourse.group/u/iquah)\
**Replies:** 0\
**Last updated:** [November 10, 2022, 7:08pm UTC](https://openfhe.discourse.group/t/marking-as-solved-support/222 "2022-11-10T19:08:52Z")

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Hi all! We’ve added the capability to mark a question as solved! If you’re asking questions, especially in the “Library Questions” or “FHE Questions”, please mark your question as solved if it has been. This way we’ll k…

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## [Does OpenFHE have Coding Style Guidelines?](https://openfhe.discourse.group/t/does-openfhe-have-coding-style-guidelines/96)

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**Author:** [@iquah](https://openfhe.discourse.group/u/iquah)\
**Replies:** 0\
**Last updated:** [August 10, 2022, 6:12pm UTC](https://openfhe.discourse.group/t/does-openfhe-have-coding-style-guidelines/96 "2022-08-10T18:12:38Z")

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For information on our: C++ style guidelines visit OpenFHE Contributing #Guidelines, which is based off of Google C++ Style Guidelines Python Style Guidelines visit OpenFHE Contributing #Python, which is based off …