Pith Number

pith:QBTXSAXQ

pith:2016:QBTXSAXQR52JZDYRNSSJTM3MPV

not attested not anchored not stored refs pending

The Time Derivative in a Singular Parabolic Equation

Peter Lindqvist

arxiv:1612.02301 v1 · 2016-12-07 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QBTXSAXQR52JZDYRNSSJTM3MPV}

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	2026-05-18T00:55:35.004977Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80677902f08f749c8f116ca499b36c7d4875e3032d6c6008409010e8b0f27ead

Aliases

arxiv: 1612.02301 · arxiv_version: 1612.02301v1 · doi: 10.48550/arxiv.1612.02301 · pith_short_12: QBTXSAXQR52J · pith_short_16: QBTXSAXQR52JZDYR · pith_short_8: QBTXSAXQ

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/QBTXSAXQR52JZDYRNSSJTM3MPV \
  | 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: 80677902f08f749c8f116ca499b36c7d4875e3032d6c6008409010e8b0f27ead

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38811c7f8b932aa180542ed73a5343f94f7a3c02180bb8585a81704256ea1a3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2016-12-07T15:48:40Z",
    "title_canon_sha256": "eec62fe26a384ecaa4869722c0b5895805ed3abae198797f354122676208563d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.02301",
    "kind": "arxiv",
    "version": 1
  }
}