Pith Number

pith:DQVHVGRG

pith:2008:DQVHVGRGF4ZDRNDDFEAJD34WBT

not attested not anchored not stored refs pending

The Case for Dynamic Models of Learners' Ontologies in Physics

Ayush Gupta, David Hammer, Edward F. Redish

arxiv:0802.4278 v2 · 2008-02-28 · 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{DQVHVGRGF4ZDRNDDFEAJD34WBT}

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	2026-05-18T04:41:35.195015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c2a7a9a262f3238b463290091ef960cf6a31006ddf83c09a4a225b62c30b5b6

Aliases

arxiv: 0802.4278 · arxiv_version: 0802.4278v2 · doi: 10.48550/arxiv.0802.4278 · pith_short_12: DQVHVGRGF4ZD · pith_short_16: DQVHVGRGF4ZDRNDD · pith_short_8: DQVHVGRG

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/DQVHVGRGF4ZDRNDDFEAJD34WBT \
  | 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: 1c2a7a9a262f3238b463290091ef960cf6a31006ddf83c09a4a225b62c30b5b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68c1d479dc5af332b9072f03eacb1a369f6aec3e130c2c70ff3ed02124a51e71",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2008-02-28T20:35:33Z",
    "title_canon_sha256": "b7f91dcf932e8cb8e15e3c751e829802640311c9eb68df5327d0dfe83ca7baba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.4278",
    "kind": "arxiv",
    "version": 2
  }
}