This led to the development of bosonic string theory, which is still the version first taught to many students.

So bosonic string theory could not explain matter.

The number of spacetime dimensions in bosonic string theory.

In bosonic string theories, the 26 dimensions come from the Polyakov equation.

- This is a one semester course on bosonic string theory aimed at beginning graduate students.

Another example of a tachyonic field is the tachyon of bosonic string theory.

Another way to look at this is that in general bosonic string theory predicts unphysical particle states called 'ghosts'.

Bosonic string theory is the original version of string theory, developed in the late 1960s.

The first term in is just the anomaly of the bosonic string theory in a flat spacetime.

This is the origin of needing 26 dimensions of space-time for bosonic string theory.

String theory began as bosonic string theory, whose 26 dimensions act as many fewer.

From what I recall, supersymmetry string theory was already replacing bosonic string theory by the early 1970s.

The fate of the closed string tachyon in the 26-dimensional bosonic string theory remains unknown, though recent progress has revealed interesting new developments.

In bosonic string theory, the attempt is to compute the possible energy levels of a string, in particularly the lowest energy level.

In addition, bosonic string theory in a general spacetime dimension displays inconsistencies due to the conformal anomaly.

Ultimately it is this fact, combined with the Goddard-Thorn theorem, which leads to bosonic string theory failing to be consistent in dimensions other than 26.

For example, bosonic string theory requires a spacetime of dimension 26 which is directly related to the presence of 24 in the Dedekind eta function.

Other examples include the inflaton field in certain models of cosmic inflation (such as new inflation), and the tachyon of bosonic string theory.

Superstring theory, M-theory and Bosonic string theory respectively posit that physical space has 10, 11 and 26 dimensions.

Yet by adding supersymmetry to bosonic string theory, fermions were achieved, and string theory became superstring theory, explaining matter, too.

It was not until 1918 that a proof (using hyperelliptic functions) was found for this remarkable fact, which has relevance to the bosonic string theory in 26 dimensions.

As it turns out, string theories involve higher-dimensional spaces than the 3D world with which we are familiar; bosonic string theory requires 25 spatial dimensions and one time axis.

The Nambu-Goto action is the simplest invariant action in bosonic string theory, and is also used in other theories that investigate string-like objects (for example, cosmic strings).

The precise number may be determined by the required cancellation of conformal anomaly on the worldsheet; it is 26 for the bosonic string theory and 10 for superstring theory.

Although bosonic string theory has many attractive features, it falls short as a viable physical model in two significant areas and is forced to posit a 26 dimensional spacetime to remedy inconsistencies.