# Pseudo-code with math
**URL:** https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215
**Category:** Uncategorized
**Created:** [August 24, 2023, 10:07am UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215 "2023-08-24T10:07:32Z")
**Posts on this page:** 6
**Page:** 2
### Author:  [@aledinola](https://discourse.vfitoolkit.com/u/aledinola)
#### Post date: [May 27, 2026, 9:02pm UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/21 "2026-05-27T21:02:53Z")
I found a few mistakes in [Pseudocodes/VFI\_PseudoCodes.pdf at main · vfitoolkit/Pseudocodes · GitHub](https://github.com/vfitoolkit/Pseudocodes/blob/main/VFI_PseudoCodes.pdf), Section 2.1.1 Refinement.
1. **Preliminary step**. We need also a loop over a^\prime since we maximize over d for all (a',a,z)
2. The policy for a^\prime is sometimes denoted g^{a^\prime}\_n, other times g\_n
It would be useful to let an AI scan the pseudocode document for inconsistent notation and imprecisions.
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### Author:  [@robertdkirkby](https://discourse.vfitoolkit.com/u/robertdkirkby)
#### Post date: [May 28, 2026, 9:06am UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/22 "2026-05-28T09:06:08Z")
Hopefully fixed them all
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### Author:  [@aledinola](https://discourse.vfitoolkit.com/u/aledinola)
#### Post date: [May 28, 2026, 10:00am UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/23 "2026-05-28T10:00:05Z")
Did you reconpile the tex? The two points I flagged in my post are not fixed yet.
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### Author:  [@robertdkirkby](https://discourse.vfitoolkit.com/u/robertdkirkby)
#### Post date: [May 28, 2026, 8:02pm UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/24 "2026-05-28T20:02:52Z")
The AI wasn’t as smart as you so it missed that one.
Fixed now
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### Author:  [@aledinola](https://discourse.vfitoolkit.com/u/aledinola)
#### Post date: [June 21, 2026, 5:18pm UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/25 "2026-06-21T17:18:44Z")
Related to the pseudo-code on grid interpolation: I noticed that the explanation of linear interpolation for finite horizon VFI is no longer present in [GitHub - vfitoolkit/Pseudocodes: Pseudocodes for the commands of VFI Toolkit · GitHub](https://github.com/vfitoolkit/Pseudocodes)
I found a really nice explanation of how the toolkit uses linear interpolation in VFI in [GitHub - robertdkirkby/GridInterpolationLayer: description of grid interpolation layer algo · GitHub](https://github.com/robertdkirkby/GridInterpolationLayer). The figures are great!
The pseudo-code for grid interpolation with finite-horizon vfi is good but the section with decision variable is missing. It was instead present in a previous version of [GitHub - vfitoolkit/Pseudocodes: Pseudocodes for the commands of VFI Toolkit · GitHub](https://github.com/vfitoolkit/Pseudocodes)
To sum up, I have a small request: is it possible to show somewhere the pseudo-code for “finite-horizon with d variable” plus “gridinterplayer”? This helps users (and AI tools as well) to better understand the code.
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### Author:  [@robertdkirkby](https://discourse.vfitoolkit.com/u/robertdkirkby)
#### Post date: [July 6, 2026, 1:57am UTC](https://discourse.vfitoolkit.com/t/pseudo-code-with-math/215/26 "2026-07-06T01:57:22Z")
I put links to grid interpolation layer and divide and conquer pdfs/repos in the pseudo-codes pdf.
Added the ‘conditional on d’ explanation to the grid interpolation layer pdf.
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