Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License
 adj. Of or pertaining to heterosis
 adj. Describing a hybrid form of string theory (See Heterotic string on Wikipedia)
Etymologies
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Examples

Once established in a deme, a negatively heterotic one with a selective disadvantage for heterozygotes–DW gene arrangement can spread in homozygous form through a subdivided population by random local extinction and colonization.

Hedrick and Levin 1984 suggested a mechanism that greatly increases the probability of fixation for negatively heterotic chromosome rearrangements during migration and colonization of other demes.

There are types I and II strings of subtype A and B and the closed heterotic string.
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This presumably requires physics which appeals to the heterotic group E_8, or in string theory the complexified CE_8 = E_8xE_8, which is a model of the heterotic string.

But we know, for instance, that in the heterotic example I discussed above, the string threshold corrections are expressed in terms of the Dedekind function in terms of the moduli which has nothing to do with N = 1 D = 4 SUGRA couplings.

In the early 1980's, I began to work on string theory again and in 1984, together with a group of younger collaborators, discovered the heterotic string, which at the time seemed to offer the possibility of explaining the

Another example is the appearance of the largest exceptional lie group, E8, as the gauge group of heterotic superstring theory.

Apart from the fact that instead of one there are five different, healthy theories of strings three superstrings and two heterotic strings there was another difficulty in studying these theories: we did not have tools to explore the theory over all possible values of the parameters in the theory.

In some other limits, it looks like weaklycoupled E8×E8 heterotic string theory.

Such nonperturbative connections between open and closed strings were discovered in this context a long time before the terms “openclosed transition”, or “openclosed duality” was invented, so people in the field point to other more recent examples as the prototype, such as here and even the heterotic/type I example in here.
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