Update Item Specifications

Item-Specifications.md

@@ -75,10 +75,20 @@ Note here that ideally the accesses to `math.config.predictable` and `math.types
 Looking at how other config properties might work, let's suppose that the `constants` property gives the numeric type that should be used for named constants (e.g., Number or BigNumber). We want `math.tau` to give a scalar entity, but we'd also like to record different possible entities for different types. Since we can't put properties on a number, we use a resolve function directly on the math object that takes the identifier to resolve:
 
 ```
-export tau = [
+export const tau = [
    [Number], 6.2831853,
    [BigNumber], math => math.bignumber('6.28318530717958647692'),
    [], math => math.resolve('tau', [math.config.constants])
 ]
 ```
-A few things to note in this example: now clients of the eventual bundle can use `math.resolve('tau', math.BigNumber)` to get the BigNumber value of tau regardless of the current type in the config.constants setting, the plain `math.tau` should resolve to the correct scalar entity, and the plain `math.tau` should be reset if either config.constants changes or if the setting of math.tau on the type config.constants changes.
+A few things to note in this example: now clients of the eventual bundle can use `math.resolve('tau', math.BigNumber)` to get the BigNumber value of tau regardless of the current type in the config.constants setting, the plain `math.tau` should resolve to the correct scalar entity, and the plain `math.tau` should be reset if either config.constants changes or if the setting of math.tau on the type config.constants changes.
+
+Finally, let's see how the troubling example of absquare in https://code.studioinfinity.org/glen/pocomath/issues/55 would pan out:
+```
+export const absquare = [[Complex], (math, [T]) => {
+   const absq = math.absq.resolve(T.Base)
+   const add = math.add.resolve(absq.returns, absq.returns)
+   return Returns(add.returns, z => add(absq(z.re), absq(z.im))
+}
+```
+This seems like a success of this scheme to me. Hence, the current plan is to recast the prototype into this format.