Pith Number

pith:U5NYE4UM

pith:2018:U5NYE4UM3335ONT6TNIMAQVEVR

not attested not anchored not stored refs pending

The equivariant Euler characteristic of $\mathcal{A}_3[2]$

Jonas Bergstr\"om, Olof Bergvall

arxiv:1804.09628 v1 · 2018-04-25 · math.AG · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U5NYE4UM3335ONT6TNIMAQVEVR}

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	2026-05-18T00:17:31.222007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a75b82728cdef7d7367e9b50c042a4ac5d5c5d043f75dd1d6ae1e6f4b6958bd1

Aliases

arxiv: 1804.09628 · arxiv_version: 1804.09628v1 · doi: 10.48550/arxiv.1804.09628 · pith_short_12: U5NYE4UM3335 · pith_short_16: U5NYE4UM3335ONT6 · pith_short_8: U5NYE4UM

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/U5NYE4UM3335ONT6TNIMAQVEVR \
  | 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: a75b82728cdef7d7367e9b50c042a4ac5d5c5d043f75dd1d6ae1e6f4b6958bd1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4f54a9cf08db2711d539ceaa63358b803b1937f934b1343a30f62b0a15c8ead",
    "cross_cats_sorted": [
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-04-25T15:31:09Z",
    "title_canon_sha256": "6ade8ebadf471cb0605cd2985d05732bd50c8f1878cf0b36a4b5fe2d545c132f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09628",
    "kind": "arxiv",
    "version": 1
  }
}