Pith Number

pith:XBN4D4BE

pith:2015:XBN4D4BEKXUADRBRVMGONLCELN

not attested not anchored not stored refs pending

Upper-division student difficulties with the Dirac delta function

Bethany R. Wilcox, Steven J. Pollock

arxiv:1501.07490 v1 · 2015-01-29 · 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{XBN4D4BEKXUADRBRVMGONLCELN}

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	2026-05-18T01:41:05.888164Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b85bc1f02455e801c431ab0ce6ac445b732065b7993b2861f0f2f5c809d09904

Aliases

arxiv: 1501.07490 · arxiv_version: 1501.07490v1 · doi: 10.48550/arxiv.1501.07490 · pith_short_12: XBN4D4BEKXUA · pith_short_16: XBN4D4BEKXUADRBR · pith_short_8: XBN4D4BE

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/XBN4D4BEKXUADRBRVMGONLCELN \
  | 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: b85bc1f02455e801c431ab0ce6ac445b732065b7993b2861f0f2f5c809d09904

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c8ad1abe5b28667f712e12742c406e40b872d330ab44a3ab91474289e0522ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2015-01-29T15:51:46Z",
    "title_canon_sha256": "0fc398b9f680165caa5ff9c116b580aa6993d900c486d712f2c57bece9489c7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.07490",
    "kind": "arxiv",
    "version": 1
  }
}