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docs: ISQ part 4 released

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Mateusz Pusz
2024-10-28 11:11:57 +01:00
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docs/blog/posts/isq-part-1-introduction.md
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@ -24,6 +24,7 @@ In this series, we will describe:
- Part 1 - Introduction
- [Part 2 - Problems when ISQ is not used](isq-part-2-problems-when-isq-is-not-used.md)
- [Part 3 - Modelling ISQ](isq-part-3-modelling-isq.md)
- [Part 4 - Implementing ISQ](isq-part-4-implemeting-isq.md)
## Terms and Definitions

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docs/blog/posts/isq-part-2-problems-when-isq-is-not-used.md
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@ -26,6 +26,7 @@ library on just units or dimensions.
- [Part 1 - Introduction](isq-part-1-introduction.md)
- Part 2 - Problems when ISQ is not used
- [Part 3 - Modelling ISQ](isq-part-3-modelling-isq.md)
- [Part 4 - Implementing ISQ](isq-part-4-implemeting-isq.md)
## Limitations of units-only solutions

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docs/blog/posts/isq-part-3-modelling-isq.md
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@ -25,6 +25,7 @@ language.
- [Part 1 - Introduction](isq-part-1-introduction.md)
- [Part 2 - Problems when ISQ is not used](isq-part-2-problems-when-isq-is-not-used.md)
- Part 3 - Modelling ISQ
- [Part 4 - Implementing ISQ](isq-part-4-implemeting-isq.md)
## Dimension is not enough to describe a quantity

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docs/blog/posts/isq-part-4-implemeting-isq.md
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@ -1,5 +1,4 @@
---
draft: true
date: 2024-10-28
authors:
- mpusz
@ -189,12 +188,16 @@ inline constexpr auto Gibbs_function = Gibbs_energy;
Again, the first parameter of `quantity_spec` determines the position in the tree. If a second
argument is provided, it denotes a recipe for this quantity.
With the above simple definitions we've automatically addressed our _energy_-related issues from
the [Various quantities of the same dimension and kinds](isq-part-2-problems-when-isq-is-not-used.md#various-quantities-of-the-same-dimension-and-kinds)
chapter of the "Part 2" article.
## Modeling a hierarchy of kind _dimensionless_
As the last example for this article, let's try to model and implement quantities of dimension one,
often also called dimensionless quantities. This [quantity hierarchy](../../appendix/glossary.md#quantity-hierarchy)
that contains more than one [quantity kind](../../appendix/glossary.md#kind) and more than one unit in its tree:
contains more than one [quantity kind](../../appendix/glossary.md#kind) and more than one unit in its tree:
```mermaid
flowchart TD
@ -238,8 +241,9 @@ but still allow the usage of `one` and its scaled versions for such quantities.
!!! note
`dimensionless` is a special quantity, and it is predefined in the library's framework
(there is no way for the user to define it).
`dimensionless` is a special quantity which serves as an identity element in quantity
equations. It is predefined in the library's framework and there is no way for the user to
define it or something similar to it.
## To be continued...