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Bent Identity Negative Asymptote Tool

Evaluate the negative-tail asymptotic line x/2-1/2 of bent identity.

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Description

Return linearAsymptote=x/2-0.5 and offset=-0.5 for bent identity x+(sqrt(x²+1)-1)/2 toward negative infinity.

Bent identity is x+(sqrt(x²+1)-1)/2. Toward negative infinity it approaches a line with slope one half and offset minus one half. An asymptotic line describes leading behavior rather than the exact activation value at finite input.

Return linearAsymptote=x/2-0.5 and offset=-0.5 for bent identity x+(sqrt(x²+1)-1)/2 toward negative infinity.

When to use this tool

Use Bent Identity Negative Asymptote when checking the stated bent-identity negative asymptote convention.

How to use the tool and how it works

  1. Enter x. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read linearAsymptote, offset. Use the output convention below.

Require x<0. Return linearAsymptote=x/2-0.5 and offset=-0.5 for bent identity x+(sqrt(x²+1)-1)/2 toward negative infinity.1

Input fieldMeaning and unitsAccepted input
xFinite scalar input coordinate; use the mathematical scale specified above.Required. Finite number; strictly below 0.
Output fieldInterpretationReturned shape
linearAsymptoteNegative-tail line x/2-1/2; not the exact finite-input activation value.Required. Finite number.
offsetOffsetRequired. Finite number.
json
{
  "input": {
    "x": -10
  },
  "output": {
    "linearAsymptote": -5.5,
    "offset": -0.5
  }
}

Limitations and assumptions

  • The returned line is asymptotic, not the activation's exact value at finite x or the limiting value of the activation itself.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use the complete explicit function and the intended parameter, branch and numerical conventions for symbolic, tensor or model-level differentiation; assess training behavior independently.

References

  1. Calculation and input contract: activation/bent-identity-negative-asymptote — tool.io

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