Pith Number

pith:2SQM7BVL

pith:2008:2SQM7BVLRDQF2HB4HDAKR7AFQ5

not attested not anchored not stored refs pending

Reinventing College Physics for Biologists: Explicating an epistemological curriculum

David Hammer, Edward F. Redish

arxiv:0807.4436 v1 · 2008-07-28 · 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{2SQM7BVLRDQF2HB4HDAKR7AFQ5}

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	2026-05-18T02:15:44.425760Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4a0cf86ab88e05d1c3c38c0a8fc0587407c173cbc4611d0dd4e09f3dab1b882

Aliases

arxiv: 0807.4436 · arxiv_version: 0807.4436v1 · doi: 10.48550/arxiv.0807.4436 · pith_short_12: 2SQM7BVLRDQF · pith_short_16: 2SQM7BVLRDQF2HB4 · pith_short_8: 2SQM7BVL

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/2SQM7BVLRDQF2HB4HDAKR7AFQ5 \
  | 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: d4a0cf86ab88e05d1c3c38c0a8fc0587407c173cbc4611d0dd4e09f3dab1b882

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d8cdc6e9eebf8ccf77beac72083e9a3641629cfc776fd5e23a7f31310d45631",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2008-07-28T12:41:45Z",
    "title_canon_sha256": "d15ac8dd8cc1a2a3838d857996bdfcace70322d4d428467ee1ca3eb239bc6c3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.4436",
    "kind": "arxiv",
    "version": 1
  }
}