Pith Number

pith:5PYQ2L2B

pith:2008:5PYQ2L2BFW7OIN3MPTWP5NV677

not attested not anchored not stored refs pending

Looking Beyond Content: Skill development for engineers

Edward F. Redish, Karl A. Smith

arxiv:0802.2950 v1 · 2008-02-20 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5PYQ2L2BFW7OIN3MPTWP5NV677}

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	2026-05-18T03:46:18.850117Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebf10d2f412dbee4376c7cecfeb6beffed413afaf3415a832089c9b1148f1003

Aliases

arxiv: 0802.2950 · arxiv_version: 0802.2950v1 · doi: 10.48550/arxiv.0802.2950 · pith_short_12: 5PYQ2L2BFW7O · pith_short_16: 5PYQ2L2BFW7OIN3M · pith_short_8: 5PYQ2L2B

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/5PYQ2L2BFW7OIN3MPTWP5NV677 \
  | 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: ebf10d2f412dbee4376c7cecfeb6beffed413afaf3415a832089c9b1148f1003

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1fc60af7520642e134ec0b5ecc7df9b5658a217f7c2241dc4183175cccfd71f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2008-02-20T21:49:20Z",
    "title_canon_sha256": "a46826b8eef1052b51c95078778972edb47970f25727615d02d7403fc4df241a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.2950",
    "kind": "arxiv",
    "version": 1
  }
}