Pith Number

pith:U5WIFA27

pith:2012:U5WIFA27XLEX64W6AM6EL6BU6A

not attested not anchored not stored refs pending

How can we improve problem-solving in undergraduate biology? Applying lessons from 30 years of physics education research

Anne-Marie Hoskinson, Jennifer K. Knight, Marcos D. Caballero

arxiv:1209.0745 v3 · 2012-09-04 · physics.ed-ph · q-bio.OT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U5WIFA27XLEX64W6AM6EL6BU6A}

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	2026-05-18T03:32:45.030601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a76c82835fbac97f72de033c45f834f00a6c74cc623bfb17d5bba7c4ce885e91

Aliases

arxiv: 1209.0745 · arxiv_version: 1209.0745v3 · doi: 10.48550/arxiv.1209.0745 · pith_short_12: U5WIFA27XLEX · pith_short_16: U5WIFA27XLEX64W6 · pith_short_8: U5WIFA27

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/U5WIFA27XLEX64W6AM6EL6BU6A \
  | 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: a76c82835fbac97f72de033c45f834f00a6c74cc623bfb17d5bba7c4ce885e91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd7d9e73fc06b852b81f69dd814b0a0f7c71c71249bbfc9ed62af9a701eff390",
    "cross_cats_sorted": [
      "q-bio.OT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2012-09-04T19:25:04Z",
    "title_canon_sha256": "d1d824bedc42a6c84572894a6e908ddb79f0b2d98299ce510b94e014c3b0bfd5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.0745",
    "kind": "arxiv",
    "version": 3
  }
}