Pith Number

pith:EDD5GE7A

pith:2017:EDD5GE7AHOPBXTHTDX7VOXO3ZV

not attested not anchored not stored refs pending

Projections in vector spaces over finite fields

Changhao Chen

arxiv:1702.03648 v5 · 2017-02-13 · math.CA · math.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EDD5GE7AHOPBXTHTDX7VOXO3ZV}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:39:18.008709Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20c7d313e03b9e1bccf31dff575ddbcd60693df6413ff9279e38d70225ff0b03

Aliases

arxiv: 1702.03648 · arxiv_version: 1702.03648v5 · doi: 10.48550/arxiv.1702.03648 · pith_short_12: EDD5GE7AHOPB · pith_short_16: EDD5GE7AHOPBXTHT · pith_short_8: EDD5GE7A

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EDD5GE7AHOPBXTHTDX7VOXO3ZV \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 20c7d313e03b9e1bccf31dff575ddbcd60693df6413ff9279e38d70225ff0b03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c9af702445d1b4d6f29509b7cab29176da43e87ee216736a1c3c7fccf92f322",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2017-02-13T06:33:57Z",
    "title_canon_sha256": "77cedff849a74d189d9f78c0d13a5e96f65a779c06c4a22123095dacf0ab52e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.03648",
    "kind": "arxiv",
    "version": 5
  }
}