Release v1.1.0: add OpenGarden, Kirby, and Kourovka

Adds OpenGarden / Open Problem Garden (422 problems), Kirby's Problems in Low-Dimensional Topology (366 problems), and Kourovka Notebook New Problems (150 problems). Total dataset size is now 2,084 problems.

README.md

@@ -11,66 +11,54 @@ tags:
   - math
   - research
   - latex
-  - erdos
-  - number-theory
-  - combinatorics
 size_categories:
   - 1K<n<10K
 pretty_name: UnsolvedMath
 ---
 
-[✅ NEW: paper discussing UnsolvedMath and open mathematical problems as an AI Reasoning Benchmark is added](https://huggingface.co/datasets/ulamai/UnsolvedMath/blob/main/open-math.pdf)
-
 # UnsolvedMath Dataset
 
-A comprehensive curated collection of **1,146 open mathematics problems** across all domains and difficulty levels, including the largest collection of Erdős problems available in machine-readable format. Available for browsing at https://unsolvedmath.com 
+A curated collection of open mathematics problems across all domains and difficulty levels.
 
-Paper "[Open Mathematical Problems as an AI Reasoning Benchmark](https://huggingface.co/datasets/ulamai/UnsolvedMath/blob/main/open-math.pdf)"
 ## Dataset Description
 
-**UnsolvedMath** is a meticulously curated dataset of unsolved and historically significant mathematical problems, organized by domain, difficulty level, and problem set. This dataset aggregates problems from the most prestigious collections in mathematics, with a particular focus on Paul Erdős's extensive problem collection.
-
-### Featured Collections
+**UnsolvedMath** is a comprehensive dataset of unsolved and historically significant mathematical problems, organized by domain, difficulty level, and problem set. This dataset aggregates problems from prestigious collections including:
 
-- **Erdős Problems** (632 problems) - Extensive collection from Paul Erdős, one of the most prolific mathematicians of the 20th century
-- **Millennium Prize Problems** - Clay Mathematics Institute's seven $1M problems
-- **Hilbert's 23 Problems** - David Hilbert's foundational problems from 1900
-- **Smale's Problems** - Steve Smale's 18 problems for the 21st century
-- **DARPA's 23 Mathematical Challenges** - Fundamental research challenges
-- **Ben Green's 100 Open Problems** - Problems in additive combinatorics
-- **Hardy-Littlewood Conjectures** - Foundational problems on primes and partitions
-- **Landau's Problems** - Four classic problems on prime numbers
-- **Richard Guy - Prime Numbers** - Problems from "Unsolved Problems in Number Theory"
+- Millennium Prize Problems
+- Hilbert's 23 Problems
+- Smale's 18 Problems for the 21st Century
+- DARPA's 23 Mathematical Challenges
+- Ben Green's 100 Open Problems
+- Erdős Problems
+- Kourovka Notebook New Problems
+- Kirby's Problems in Low-Dimensional Topology
+- OpenGarden / Open Problem Garden
 
 ### Dataset Summary
 
-- **Total Problems**: 1,146
-- **Erdős Problems**: 632 (with full citations and references)
-- **Categories**: 12 mathematical domains
+- **Total Problems**: 2084
+- **Version**: 1.1.0
+- **Categories**: 17 mathematical domains
 - **Difficulty Levels**: 5 (L1: Tractable → L5: Millennium Prize)
-- **Problem Sets**: 9 curated collections
-- **Format**: JSON with LaTeX mathematical notation
+- **Problem Sets**: 12 curated collections
+- **Format**: JSON
 - **License**: CC BY 4.0
 
-### What's New
+### New in v1.1.0
+
+This release adds three large source collections:
 
-This dataset includes the most comprehensive collection of Erdős problems available in structured format:
-- **632 Erdős problems** (EP-1 through EP-1135) from the Erdos Problems website
-- Complete problem statements with LaTeX mathematical notation
-- Detailed backgrounds with historical context
-- Full bibliographic references for each problem
-- Difficulty classifications (L1-L3)
-- Category assignments (Number Theory, Combinatorics, Graph Theory, etc.)
+- **OpenGarden / Open Problem Garden**: 422 problems
+- **Kirby's Problems in Low-Dimensional Topology**: 366 problems
+- **Kourovka Notebook New Problems**: 150 problems
 
 ### Supported Tasks
 
 - Mathematical research and exploration
-- Mathematical question answering systems
+- Mathematical question answering
 - LaTeX/mathematical notation processing
 - Problem classification and organization
 - Educational content generation
-- Research bibliography extraction
-- Historical mathematics analysis
 
 ## Dataset Structure
 
@@ -78,11 +66,12 @@ This dataset includes the most comprehensive collection of Erdős problems avail
 
 The dataset consists of multiple JSON files:
 
-1. **problems.json** (1.4 MB) - Main dataset containing all 1,146 problems
-2. **categories.json** (3.0 KB) - 12 mathematical domain classifications
-3. **difficulty_levels.json** (1.1 KB) - 5-tier difficulty system
-4. **sets.json** (3.1 KB) - Problem set metadata
-5. **dataset.json** (1.5 MB) - Combined file with all data and metadata
+1. **problems.json** - Main dataset containing all problems
+2. **categories.json** - Mathematical domain classifications
+3. **difficulty_levels.json** - 5-tier difficulty system
+4. **sets.json** - Problem set metadata (Millennium Prize, Hilbert's 23, etc.)
+5. **dataset.json** - Combined file with all data
+6. **statistics.json** - Dataset statistics
 
 ### Data Fields
 
@@ -91,103 +80,101 @@ The dataset consists of multiple JSON files:
 Each problem contains:
 
 - `id` (int): Unique identifier
-- `problem_number` (string): Problem code (e.g., "EP-1", "MPP-001")
 - `title` (string): Problem title
 - `statement` (string): Complete problem statement with LaTeX notation
-- `background` (string): Historical context, references, and related work
-- `difficulty_level_id` (int): Difficulty level (1-5)
-- `status` (string): "open" or "solved"
-- `category_id` (int): Mathematical domain identifier
-- `set_id` (int, optional): Problem set identifier
-- `proposed_by` (string, optional): Person who proposed the problem
-- `proposed_year` (int, optional): Year the problem was first posed
-- `view_count` (int): Number of views
-- `favorite_count` (int): Number of favorites
+- `background` (string, optional): Historical context and background
+- `category` (object): Mathematical domain
+  - `id`, `name`, `display_name`, `description`, `slug`
+- `difficulty` (object): Difficulty classification
+  - `id`, `level`, `name`, `description`, `color_class`
+- `status` (string): "open", "solved", or "partially_solved"
+- `source_url` (string, optional): Reference URL
+- `sets` (array, optional): Associated problem sets
+- `tags` (array, optional): Additional tags
+- `year_proposed` (int, optional): Year the problem was first posed
+- `solved_year` (int, optional): Year solved (if applicable)
+- `solved_by` (string, optional): Solver's name
+- `prize_amount` (int, optional): Prize money (USD)
 - `created_at` (string): Timestamp
-- `updated_at` (string): Timestamp
-- `published` (boolean): Publication status
 
 #### Categories
 
-12 mathematical domains:
-- **Number Theory** - Properties of integers, primes, Diophantine equations
-- **Combinatorics** - Counting, arrangements, combinatorial structures
-- **Graph Theory** - Networks, graphs, and their properties
-- **Algebra** - Algebraic structures and equations
-- **Algebraic Geometry** - Geometric objects defined by polynomials
-- **Geometry** - Euclidean and non-Euclidean geometry
-- **Topology** - Properties preserved under continuous deformations
-- **Analysis** - Limits, continuity, calculus, function theory
-- **Partial Differential Equations** - PDEs and applications
-- **Set Theory** - Foundations, infinite sets, cardinality
-- **Computer Science** - Computational complexity, algorithms
-- **Mathematical Physics** - Mathematics-physics intersection
+17 mathematical domains:
+- **Number Theory**: Properties of integers, prime numbers, Diophantine equations.
+- **Combinatorics**: Counting problems, graph theory, discrete structures.
+- **Graph Theory**: Problems involving graphs, networks, and their properties.
+- **Algebra**: Group theory, ring theory, field theory, and algebraic structures.
+- **Algebraic Geometry**: Geometric objects defined by polynomial equations.
+- **Geometry**: Euclidean and non-Euclidean geometry, geometric structures.
+- **Topology**: Properties preserved under continuous deformations.
+- **Analysis**: Limits, continuity, calculus, and function theory.
+- **Partial Differential Equations**: PDEs and their applications in physics and geometry.
+- **Set Theory**: Foundations of mathematics, infinite sets, and cardinality.
+- **Dynamical Systems**: Problems about long-term behavior of deterministic systems, Hamiltonian dynamics, and periodic orbits.
+- **Computer Science**: Computational complexity, algorithms, and theoretical CS.
+- **Mathematical Physics**: Problems at the intersection of mathematics and physics.
+- **Group Theory**: Problems about groups, group actions, representations, and related algebraic structures.
+- **Logic**: Problems in mathematical logic, model theory, proof theory, and finite model theory.
+- **Probability**: Problems involving probability theory, stochastic processes, and random structures.
+- **Miscellaneous**: Problems whose source classification does not fit the main mathematical categories.
 
 #### Difficulty Levels
 
-- **L1: Tractable** - Problems potentially within reach with current techniques
-- **L2: Intermediate** - Challenging problems requiring solid mathematical background
-- **L3: Advanced** - Difficult problems requiring specialized knowledge
-- **L4: Expert** - Very challenging problems at the frontier of research
-- **L5: Millennium Prize** - Millennium Prize Problems and equivalent difficulty
-
-#### Problem Sets
-
-- Millennium Prize Problems (7 problems)
-- Hilbert's 23 Problems
-- Smale's Problems (18 problems)
-- DARPA's 23 Mathematical Challenges
-- Ben Green's 100 Open Problems
-- **Erdős Problems (632 problems)**
-- Hardy-Littlewood Conjectures
-- Landau's Problems (4 problems)
-- Richard Guy - A: Prime Numbers
+- **L1: Tractable**: Problems that may be within reach with current techniques. Reserved for future additions.
+- **L2: Intermediate**: Challenging problems requiring solid mathematical background. Reserved for future additions.
+- **L3: Advanced**: Difficult problems requiring specialized knowledge and sophisticated techniques.
+- **L4: Expert**: Very challenging problems at the frontier of mathematical research.
+- **L5: Millennium Prize**: Millennium Prize Problems and problems of equivalent difficulty.
+
+## Dataset Statistics
+
+### Problems by Difficulty
+
+- L1: Tractable: 916
+- L3: Advanced: 496
+- L2: Intermediate: 316
+- L4: Expert: 220
+- L5: Millennium Prize: 136
+
+### Problems by Category
+
+- Number Theory: 546
+- Graph Theory: 441
+- Topology: 424
+- Combinatorics: 230
+- Group Theory: 155
+- Geometry: 117
+- Algebra: 89
+- Computer Science: 24
+- Set Theory: 16
+- Logic: 10
+- Algebraic Geometry: 9
+- Partial Differential Equations: 8
+- Mathematical Physics: 6
+- Analysis: 5
+- Dynamical Systems: 2
+- Probability: 1
+- Miscellaneous: 1
+
+### Problems by Status
+
+- Open: 2075
+- Solved: 9
+- Partially Solved: 0
 
 ## Usage
 
 ### Loading the Dataset
 
 ```python
-import json
+from datasets import load_dataset
 
-# Load all problems
-with open('problems.json', 'r', encoding='utf-8') as f:
-    problems = json.load(f)
-
-print(f"Total problems: {len(problems)}")
+# Load the full dataset
+dataset = load_dataset("ulamai/UnsolvedMath", data_files="dataset.json")
 
-# Load the complete dataset
-with open('dataset.json', 'r', encoding='utf-8') as f:
-    data = json.load(f)
-
-print(f"Problems: {data['metadata']['total_problems']}")
-print(f"Categories: {len(data['categories'])}")
-print(f"Sets: {len(data['sets'])}")
-```
-
-### Example: Filtering Erdős Problems
-
-```python
-import json
-
-with open('problems.json', 'r') as f:
-    problems = json.load(f)
-
-# Get all Erdős problems
-erdos_problems = [
-    p for p in problems
-    if p['problem_number'].startswith('EP-')
-]
-
-print(f"Found {len(erdos_problems)} Erdős problems")
-
-# Get Erdős problems in Number Theory
-erdos_nt = [
-    p for p in erdos_problems
-    if p['category_id'] == 1  # Number Theory
-]
-
-print(f"Erdős problems in Number Theory: {len(erdos_nt)}")
+# Or load individual files
+problems = load_dataset("ulamai/UnsolvedMath", data_files="problems.json")
+categories = load_dataset("ulamai/UnsolvedMath", data_files="categories.json")
 ```
 
 ### Example: Filtering by Difficulty
@@ -199,129 +186,53 @@ with open('problems.json', 'r') as f:
     problems = json.load(f)
 
 # Get all Millennium Prize problems (L5)
-millennium = [
+millennium_problems = [
     p for p in problems
-    if p['difficulty_level_id'] == 5
+    if p.get('difficulty', {}).get('level') == 5
 ]
 
-# Get tractable problems (L1)
-tractable = [
-    p for p in problems
-    if p['difficulty_level_id'] == 1
-]
-
-print(f"Millennium Prize problems: {len(millennium)}")
-print(f"Tractable problems: {len(tractable)}")
+print(f"Found {len(millennium_problems)} Millennium Prize problems")
 ```
 
-### Example: Working with LaTeX
+### Example: LaTeX Rendering
 
 ```python
-# Problems contain LaTeX notation in statement and background fields
+# Problems contain LaTeX notation in the statement field
 problem = problems[0]
-print(f"Title: {problem['title']}")
-print(f"Statement: {problem['statement']}")
+print(problem['statement'])
 
-# Example statement with LaTeX:
-# "If $A\\subseteq \\{1,\\ldots,N\\}$ with $\\lvert A\\rvert=n$
-#  is such that the subset sums $\\sum_{a\\in S}a$ are distinct
-#  for all $S\\subseteq A$ then $N \\gg 2^{n}$."
-
-# Use KaTeX, MathJax, or sympy to render LaTeX
-from IPython.display import display, Markdown
-display(Markdown(problem['statement']))
-```
-
-### Example: Extracting Citations from Erdős Problems
-
-```python
-import json
-import re
-
-with open('problems.json', 'r') as f:
-    problems = json.load(f)
-
-# Get all Erdős problems
-erdos = [p for p in problems if p['problem_number'].startswith('EP-')]
-
-# Extract citations from background
-citations = set()
-for problem in erdos:
-    bg = problem.get('background', '')
-    # Find citations like \\cite{Er98}
-    refs = re.findall(r'\\cite\{([^}]+)\}', bg)
-    citations.update(refs)
-
-print(f"Unique citations in Erdős problems: {len(citations)}")
-print(f"Examples: {list(citations)[:10]}")
+# Use a LaTeX renderer like matplotlib or sympy to display
+from sympy import latex, sympify
+# ... render LaTeX content
 ```
 
 ## Data Collection and Curation
 
-### Sources
-
 This dataset was curated from:
-- Erdős problems website by Thomas Bloom (erdosproblems.com)
-- Clay Mathematics Institute - Official Millennium Prize documentation
-- Historical mathematical problem collections (Hilbert, Smale, Landau)
+- Official Millennium Prize Problems documentation
+- Historical mathematical problem collections
 - Published research papers and mathematical surveys
-- Reputable mathematical organizations (AMS, IMU, etc.)
-- Richard Guy's "Unsolved Problems in Number Theory"
-- Ben Green's additive combinatorics problem collection
-
-### Erdős Problems Special Notes
-
-The 632 Erdős problems include:
-- Complete problem statements
-- Detailed backgrounds with historical context from original sources
-- Full bibliographic references (e.g., Erdős papers from 1931-1999)
-- Cross-references between related problems
-- Citations to recent progress and partial results
-- OEIS sequence references where applicable
-- Connections to other famous problems and conjectures
-
-### Quality Assurance
+- Reputable mathematical organizations (Clay Mathematics Institute, AMS, etc.)
 
 All problems include:
-- Accurate mathematical statements with proper LaTeX notation (mostly, there might be some smaller corrections needed)
-- Historical context and background information
+- Accurate mathematical statements with LaTeX notation
+- Historical context and background
 - Proper attribution and source references
-- Classification by mathematical domain and difficulty
-
-## Statistics
-
-### By Difficulty Level
-- **L1 (Tractable)**: 662 problems (57.8%)
-- **L2 (Intermediate)**: 56 problems (4.9%)
-- **L3 (Advanced)**: 72 problems (6.3%)
-- **L4 (Expert)**: 220 problems (19.2%)
-- **L5 (Millennium)**: 136 problems (11.9%)
-
-### By Category
-- **Number Theory**: 497 problems (43.4%) - heavily represented in Erdős problems
-- **Graph Theory**: 214 problems (18.7%)
-- **Combinatorics**: 195 problems (17.0%)
-- **Other categories**: 240 problems (20.9%)
-
-### By Set
-- **Erdős Problems**: 632 problems (55.1% of total)
-- **Other historical collections**: 514 problems (44.9% of total)
+- Classification by domain and difficulty
 
 ## Ethical Considerations
 
 - **Academic Integrity**: This dataset is for research and educational purposes
-- **Attribution**: All problems properly attributed to original sources
-- **Open Problems**: Status accuracy maintained as of January 2026
+- **Attribution**: All problems are properly attributed to their original sources
+- **Open Problems**: Status accuracy maintained to the best of our knowledge as of the dataset creation date
 - **Updates**: Some problems may be solved after dataset publication
-- **Citations**: Erdős problems include full bibliographic references for verification
 
 ## Limitations
 
 - The dataset represents a curated selection, not an exhaustive list of all unsolved problems
-- Problem difficulty is subjective
+- Problem difficulty is subjective and based on expert consensus
 - LaTeX notation may require preprocessing for some applications
 - Status (open/solved) should be verified for time-sensitive applications
-- Some Erdős problem backgrounds contain extensive LaTeX citations that may need special handling
 
 ## Citation
 
@@ -330,22 +241,9 @@ If you use this dataset in your research, please cite:
 ```bibtex
 @misc{unsolvedmath2026,
   title={UnsolvedMath: A Curated Collection of Open Mathematics Problems},
-  author={P. Chojecki},
+  author={UnsolvedMath Contributors},
   year={2026},
   howpublished={\url{https://huggingface.co/datasets/ulamai/UnsolvedMath}},
-  note={Includes over 1000 open mathematical problems}
-}
-```
-
-For the Erdős problems specifically:
-
-```bibtex
-@misc{erdos-problems,
-  title={Erdős Problems},
-  author={T. F. Bloom},
-  year={2026},
-  howpublished={\url{https://www.erdosproblems.com}},
-  note={Forum}
 }
 ```
 
@@ -353,7 +251,7 @@ For the Erdős problems specifically:
 
 ### Dataset Curators
 
-Przemek Chojecki
+UnsolvedMath project contributors
 
 ### Licensing Information
 
@@ -366,20 +264,13 @@ You are free to:
 Under the following terms:
 - Attribution — You must give appropriate credit and indicate if changes were made
 
-### Updates and Maintenance
-
-- **Version**: 1.0.0
-- **Last Updated**: 2026-01-24
-- **Total Problems**: 1,146
-- **Erdős Problems Added**: 2026-01-24
-
 ### Contact
 
-For questions, issues, or contributions, visit the project repository.
+For questions, issues, or contributions:
+- Website: [unsolvedmath.com](https://unsolvedmath.com)
+- Dataset: [huggingface.co/datasets/ulamai/UnsolvedMath](https://huggingface.co/datasets/ulamai/UnsolvedMath)
 
 ---
 
-**Generated**: 2026-01-24
-**Version**: 1.0.0
-**Total Problems**: 1,146
-**Erdős Problems**: 632
+**Generated**: 2026-05-13T14:45:21.516Z
+**Version**: 1.1.0

categories.json

@@ -6,7 +6,7 @@
     "description": "Properties of integers, prime numbers, Diophantine equations.",
     "slug": "number-theory",
     "order_index": 1,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.186Z"
   },
   {
     "id": 2,
@@ -15,7 +15,7 @@
     "description": "Counting problems, graph theory, discrete structures.",
     "slug": "combinatorics",
     "order_index": 2,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 3,
@@ -24,7 +24,7 @@
     "description": "Problems involving graphs, networks, and their properties.",
     "slug": "graph-theory",
     "order_index": 3,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 4,
@@ -33,7 +33,7 @@
     "description": "Group theory, ring theory, field theory, and algebraic structures.",
     "slug": "algebra",
     "order_index": 4,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 5,
@@ -42,7 +42,7 @@
     "description": "Geometric objects defined by polynomial equations.",
     "slug": "algebraic-geometry",
     "order_index": 5,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 6,
@@ -51,7 +51,7 @@
     "description": "Euclidean and non-Euclidean geometry, geometric structures.",
     "slug": "geometry",
     "order_index": 6,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 7,
@@ -60,7 +60,7 @@
     "description": "Properties preserved under continuous deformations.",
     "slug": "topology",
     "order_index": 7,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 8,
@@ -69,7 +69,7 @@
     "description": "Limits, continuity, calculus, and function theory.",
     "slug": "analysis",
     "order_index": 8,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 9,
@@ -78,7 +78,7 @@
     "description": "PDEs and their applications in physics and geometry.",
     "slug": "pde",
     "order_index": 9,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 10,
@@ -87,7 +87,16 @@
     "description": "Foundations of mathematics, infinite sets, and cardinality.",
     "slug": "set-theory",
     "order_index": 10,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 11,
+    "name": "dynamical_systems",
+    "display_name": "Dynamical Systems",
+    "description": "Problems about long-term behavior of deterministic systems, Hamiltonian dynamics, and periodic orbits.",
+    "slug": "dynamical-systems",
+    "order_index": 11,
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 15,
@@ -96,7 +105,7 @@
     "description": "Computational complexity, algorithms, and theoretical CS.",
     "slug": "computer-science",
     "order_index": 15,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 16,
@@ -105,6 +114,42 @@
     "description": "Problems at the intersection of mathematics and physics.",
     "slug": "physics",
     "order_index": 16,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 17,
+    "name": "group_theory",
+    "display_name": "Group Theory",
+    "description": "Problems about groups, group actions, representations, and related algebraic structures.",
+    "slug": "group-theory",
+    "order_index": 17,
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 18,
+    "name": "logic",
+    "display_name": "Logic",
+    "description": "Problems in mathematical logic, model theory, proof theory, and finite model theory.",
+    "slug": "logic",
+    "order_index": 18,
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 19,
+    "name": "probability",
+    "display_name": "Probability",
+    "description": "Problems involving probability theory, stochastic processes, and random structures.",
+    "slug": "probability",
+    "order_index": 19,
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 20,
+    "name": "miscellaneous",
+    "display_name": "Miscellaneous",
+    "description": "Problems whose source classification does not fit the main mathematical categories.",
+    "slug": "miscellaneous",
+    "order_index": 20,
+    "created_at": "2026-05-13T14:45:21.187Z"
   }
 ]

sets.json

@@ -6,7 +6,7 @@
     "description": "Seven problems selected by the Clay Mathematics Institute in 2000, each with a $1,000,000 prize for solution.",
     "slug": "millennium-prize",
     "order_index": 1,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 2,
@@ -15,7 +15,7 @@
     "description": "David Hilbert's list of 23 unsolved problems presented at the International Congress of Mathematicians in Paris in 1900.",
     "slug": "hilbert-problems",
     "order_index": 2,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 3,
@@ -24,7 +24,7 @@
     "description": "A collection of 100 open problems in additive combinatorics and related areas, compiled by Ben Green.",
     "slug": "green-problems",
     "order_index": 3,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 4,
@@ -33,7 +33,7 @@
     "description": "Mathematical challenges identified by DARPA to drive fundamental research in mathematics.",
     "slug": "darpa-challenges",
     "order_index": 4,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 5,
@@ -42,7 +42,7 @@
     "description": "Steve Smale's list of mathematical problems for the 21st century.",
     "slug": "smale-problems",
     "order_index": 5,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 6,
@@ -51,7 +51,7 @@
     "description": "Four basic problems about prime numbers posed by Edmund Landau at the 1912 International Congress of Mathematicians.",
     "slug": "landau-problems",
     "order_index": 6,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 7,
@@ -60,7 +60,7 @@
     "description": "A collection of fundamental conjectures on prime numbers, Goldbach-type problems, and Waring's problem from the \"Partitio Numerorum\" papers (1919-1923) by G.H. Hardy and J.E. Littlewood.",
     "slug": "hardy-littlewood-conjectures",
     "order_index": 7,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 8,
@@ -69,7 +69,7 @@
     "description": "A collection of open problems posed by Paul Erdős, one of the most prolific mathematicians of the 20th century. These problems span combinatorics, number theory, graph theory, and analysis.",
     "slug": "erdos-problems",
     "order_index": 8,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
   },
   {
     "id": 9,
@@ -78,6 +78,33 @@
     "description": "Problems from Chapter A (Prime Numbers) of Richard Guy's \"Unsolved Problems in Number Theory\", a comprehensive collection of open questions in prime number theory.",
     "slug": "guy-prime-numbers",
     "order_index": 9,
-    "created_at": "2024-01-01T00:00:00Z"
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 10,
+    "name": "kourovka_new_problems_21",
+    "display_name": "Kourovka Notebook - New Problems, Issue 21",
+    "description": "New group theory problems from the 21st issue of the Kourovka Notebook, published in 2026.",
+    "slug": "kourovka-new-problems-21",
+    "order_index": 10,
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 11,
+    "name": "kirby_low_dimensional_topology",
+    "display_name": "Kirby's Problems in Low-Dimensional Topology",
+    "description": "Problems from Kirby-style notes on low-dimensional topology, including knot theory, 3-manifolds, 4-manifolds, and related invariants.",
+    "slug": "kirby-low-dimensional-topology",
+    "order_index": 11,
+    "created_at": "2026-05-13T14:45:21.187Z"
+  },
+  {
+    "id": 12,
+    "name": "opengarden",
+    "display_name": "OpenGarden",
+    "description": "Problems imported from the Open Problem Garden collection, using source statements, discussion notes, and subject metadata.",
+    "slug": "opengarden",
+    "order_index": 12,
+    "created_at": "2026-05-13T14:45:21.187Z"
   }
 ]

statistics.json

@@ -0,0 +1,45 @@
+{
+  "total_problems": 2084,
+  "problems_by_difficulty": {
+    "L5: Millennium Prize": 136,
+    "L3: Advanced": 496,
+    "L4: Expert": 220,
+    "L2: Intermediate": 316,
+    "L1: Tractable": 916
+  },
+  "problems_by_category": {
+    "Computer Science": 24,
+    "Number Theory": 546,
+    "Mathematical Physics": 6,
+    "Partial Differential Equations": 8,
+    "Algebraic Geometry": 9,
+    "Combinatorics": 230,
+    "Graph Theory": 441,
+    "Topology": 424,
+    "Geometry": 117,
+    "Algebra": 89,
+    "Set Theory": 16,
+    "Dynamical Systems": 2,
+    "Group Theory": 155,
+    "Analysis": 5,
+    "Logic": 10,
+    "Probability": 1,
+    "Miscellaneous": 1
+  },
+  "problems_by_status": {
+    "open": 2075,
+    "solved": 9
+  },
+  "problems_by_set": {
+    "millennium_prize": 6,
+    "hilbert_problems": 11,
+    "landau_problems": 1,
+    "smale_problems": 8,
+    "darpa_challenges": 17,
+    "green_problems": 85,
+    "erdos_problems": 632,
+    "kourovka_new_problems_21": 150,
+    "kirby_low_dimensional_topology": 366,
+    "opengarden": 422
+  }
+}