Trigrams and digrams (also called bigrams) and are ordered triplets and pairs of letters respectively. For example one common digram in the English language is "th". When presented with the letter "t" in the initial position of a word, there is a very high probability that the letter "h" will follow. Common digrams and trigrams are recognized by skilled readers. Recognition of these combinations increases as knowledge of the English language becomes more advanced. Associations between letters can be analyzed using computer software and the frequencies of letter combinations in English.
Trigram may also refer to:
Bagua (concept), a fundamental philosophical concept in ancient China
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The trigrams are taken out of their grouping in pairs of opposites and shown in the temporal progression in which they manifest themselves in the phenomenal world in the cycle of the year.
These two groups of trigrams are called the dong si zhai, the "four eastern halls," and the xi si zhai, the "four western halls," and form the configuration around the houtian sequence of trigrams as illustrated in figure 3 (click on the link to the left to see the illustration).
Now, when each trigram of the disc is matched in turn with all trigrams of the grid, we find that half of the disc trigrams are fortunate matches (their sums or differences are multiples of 5) with the same fourtrigrams of the grid--specifically, the directions east, southeast, south, and north.
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