From 5bbcacdfcebf92c6dcd695826874babc2c509147 Mon Sep 17 00:00:00 2001
From: "Victor V. Albert" <valbert4@gmail.com>
Date: Fri, 23 Aug 2024 13:28:08 -0400
Subject: [PATCH] subspace

---
 code_extra/bib_preset.yml                     |  5 +++
 .../q-ary_digits/projective/subspace.yml      | 32 +++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 codes/classical/q-ary_digits/projective/subspace.yml

diff --git a/code_extra/bib_preset.yml b/code_extra/bib_preset.yml
index 4c465d80e..2402fefa3 100644
--- a/code_extra/bib_preset.yml
+++ b/code_extra/bib_preset.yml
@@ -265,6 +265,11 @@ HKSstc:
     flm: >-
         F. Oggier, "Spacetime Coding." Concise Encyclopedia of Coding Theory (Chapman and Hall/CRC, 2021) \href{https://doi.org/10.1201/9781315147901}{DOI}
 
+HKSnetwork:
+  _ready_formatted:
+    flm: >-
+        F. R. Kschischang, "Network Codes." Concise Encyclopedia of Coding Theory (Chapman and Hall/CRC, 2021) \href{https://doi.org/10.1201/9781315147901}{DOI}
+
 HKSfountain:
   _ready_formatted:
     flm: >-
diff --git a/codes/classical/q-ary_digits/projective/subspace.yml b/codes/classical/q-ary_digits/projective/subspace.yml
new file mode 100644
index 000000000..fa26bc1ed
--- /dev/null
+++ b/codes/classical/q-ary_digits/projective/subspace.yml
@@ -0,0 +1,32 @@
+#######################################################
+## This is a code entry in the error correction zoo. ##
+##       https://github.com/errorcorrectionzoo       ##
+#######################################################
+
+code_id: subspace
+physical: q-ary_digits
+logical: q-ary_digits
+
+name: 'Subspace code'
+introduced: \cite{doi:10.1109/TIT.2008.926449}
+
+description: |
+  A code that is a set of subspaces of a projective space \(PG(n-1,q)\).
+
+protection: |
+  Subspace codes are quantified with respect to the subspace distance \cite{doi:10.1109/TIT.2008.926449}; see \cite{preset:HKSnetwork}.
+
+realizations:
+  - 'Wireless networks \cite{preset:HKSnetwork}.'
+
+relations:
+  parents:
+    - code_id: projective
+
+
+# Begin Entry Meta Information
+_meta:
+  # Change log - most recent first
+  changelog:
+    - user_id: VictorVAlbert
+      date: '2024-08-23'